XE-1325: Integrate the Workspaces feature by default in the default XE distribution.

* Changing a test in WorkspaceManager.Install to change the workspace template settings even if
  the template already has the content of xwiki-enterprise-workspace-ui-template-features.
Merge pull request #157 from gdelhumeau/master

XE-1325: Integrate the Workspaces feature by default in the default XE distribution
* Changing a test in WorkspaceManager.Install to change the workspace template settings even if the template already has the content of xwiki-enterprise-workspace-ui-template-features.
* It solves the issue of WorkspaceInformationsPanel that was not set in (sub)wikis.