Rename "openoffice" parameter in xwiki.proprieties, to "office"

Whithin xwiki.proprieties, we have a section that allows the configuration of Office Server. The entire section is referencing "OpenOffice" , having the parameters themselves (server type, port, path etc.) called "openoffice".
For the purpose of consistency, this configuration section should be renamed "Settings for the Office server ..." and the parameters renamed "office<param>" (eg. "office.serverType" instead of "openoffice.serverType").

It is my understanding that the XWiki UI went through a similar transition from "OpenOffice" to "Office". This modification should also be made in configuration files, to avoid confusion.