Fix deprecated warnings from the console

2015-03-30 13:12:58,828 [http://172.16.55.32:8080/xwiki/bin/view/Blog/WebPreferences] WARN  o.x.v.i.DefaultVelocityEngine  - Deprecated usage of method [org.apache.velocity.tools.generic.ListTool.contains] in 86:xwiki:XWiki.Ratings^xwiki:XWiki.UIExtensionClass[0]@15,35 
2015-03-30 13:13:28,190 [http://172.16.55.32:8080/xwiki/bin/view/Blog/] WARN  o.x.v.i.DefaultVelocityEngine  - Deprecated usage of method [org.apache.velocity.tools.generic.ListTool.contains] in 81:xwiki:XWiki.Ratings^xwiki:XWiki.UIExtensionClass[0]@15,35 
2015-03-30 13:13:32,390 [http://172.16.55.32:8080/xwiki/bin/view/XWiki/Ratings?xpage=plain&outputSyntax=plain&doc=xwiki:Blog.WebHome&vote=3] WARN  o.x.v.i.DefaultVelocityEngine  - Deprecated usage of method [com.xpn.xwiki.api.Util.parseInt] in 18:xwiki:XWiki.Ratings@5,20 
2015-03-30 13:13:33,655 [http://172.16.55.32:8080/xwiki/bin/view/XWiki/Ratings?xpage=plain&outputSyntax=plain&doc=xwiki:Blog.WebHome&vote=5] WARN  o.x.v.i.DefaultVelocityEngine  - Deprecated usage of method [com.xpn.xwiki.api.Util.parseInt] in 13:xwiki:XWiki.Ratings@5,20