Remove dependency on Workspace API.
XWIKI-9516: Create a new Wiki API that replaces xwiki-platform-wiki-manager and xwiki-platform-workspace.

* Fix xwiki.cfg and pom.xml
Merge remote-tracking branch 'upstream/master' into feature-new-wiki-api
Merge pull request #52 from gdelhumeau/feature-new-wiki-api

XWIKI-9516: Create a new Wiki API that replaces xwiki-platform-wiki-manager and xwiki-platform-workspace.
XE-1347: There are lots of conflicts for standard pages when upgrading from 4.1.4 to 5.2.1 using distribution wizard
XE-1347: There are lots of conflicts for standard pages when upgrading from 4.1.4 to 5.2.1 using distribution wizard
* also ix the same issue in xwiki-enterprise-ui-mainwiki