Change wgMetaNamespace for OfficeWiki and add alias

This patch changes $wgMetaNamespace for OfficeWiki
to 'OfficeWiki' (ORLY) and adds 'OW' as an additional
alias for NS_PROJECT per request from Mark Holmquist.

The consensus is there, I just can't see it.

Bug: 64976
Change-Id: I09018245eca6b581d87d54a49a0c782c4e35337e
Merge "Change wgMetaNamespace for OfficeWiki and add alias"