Cannot remove macros.vm from the templates directory

Steps to reproduce:

1. move macros.vm from templates/ to skins/colibri
2. make sure flamingo has its own macros.vm file
3. start the wiki
   You get this stacktrace on the page:

   Error number 4001 in 4: Error while evaluating velocity template view.vm
   
   Error number 4001 in 4: Error while evaluating velocity template view.vm
   com.xpn.xwiki.XWikiException: Error number 4001 in 4: Error while evaluating velocity template view.vm
   	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1637)
   	at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:179)
   	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:358)
   	at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:149)
   	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
   	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
   	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
   	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
   	at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
   	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
   	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:769)
   	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1667)
   	at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:115)
   	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
   	at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:127)
   	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
   	at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63)
   	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
   	at com.xpn.xwiki.plugin.webdav.XWikiDavFilter.doFilter(XWikiDavFilter.java:66)
   	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
   	at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208)
   	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
   	at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111)
   	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1650)
   	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:583)
   	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
   	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
   	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
   	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1125)
   	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
   	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
   	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1059)
   	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
   	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:215)
   	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
   	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
   	at org.eclipse.jetty.server.Server.handle(Server.java:497)
   	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
   	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:248)
   	at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
   	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:610)
   	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:539)
   	at java.lang.Thread.run(Thread.java:745)
   Caused by: org.xwiki.velocity.XWikiVelocityException: Cannot start the Velocity engine
   	at org.xwiki.velocity.internal.DefaultVelocityEngine.initialize(DefaultVelocityEngine.java:126)
   	at org.xwiki.velocity.internal.DefaultVelocityFactory.createVelocityEngine(DefaultVelocityFactory.java:89)
   	at com.xpn.xwiki.render.DefaultVelocityManager.getVelocityEngine(DefaultVelocityManager.java:234)
   	at com.xpn.xwiki.internal.template.TemplateManager.evaluateContent(TemplateManager.java:779)
   	at com.xpn.xwiki.internal.template.TemplateManager.renderFromSkin(TemplateManager.java:689)
   	at com.xpn.xwiki.internal.template.TemplateManager.renderFromSkin(TemplateManager.java:676)
   	at com.xpn.xwiki.internal.template.TemplateManager.renderFromSkin(TemplateManager.java:649)
   	at com.xpn.xwiki.internal.template.TemplateManager.render(TemplateManager.java:642)
   	at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:1632)
   	... 42 more
   Caused by: org.apache.velocity.exception.VelocityException: Velocimacro : Error using VM library : /templates/macros.vm
   	at org.apache.velocity.runtime.VelocimacroFactory.initVelocimacro(VelocimacroFactory.java:219)
   	at org.apache.velocity.runtime.RuntimeInstance.init(RuntimeInstance.java:274)
   	at org.apache.velocity.app.VelocityEngine.init(VelocityEngine.java:93)
   	at org.xwiki.velocity.internal.DefaultVelocityEngine.initialize(DefaultVelocityEngine.java:124)
   	... 50 more
   Caused by: org.apache.velocity.exception.ResourceNotFoundException: Unable to find resource '/templates/macros.vm'
   	at org.apache.velocity.runtime.resource.ResourceManagerImpl.loadResource(ResourceManagerImpl.java:474)
   	at org.apache.velocity.runtime.resource.ResourceManagerImpl.getResource(ResourceManagerImpl.java:352)
   	at org.apache.velocity.runtime.RuntimeInstance.getTemplate(RuntimeInstance.java:1533)
   	at org.apache.velocity.runtime.RuntimeInstance.getTemplate(RuntimeInstance.java:1514)
   	at org.apache.velocity.runtime.VelocimacroFactory.initVelocimacro(VelocimacroFactory.java:202)
   	... 53 more