XWIKI-9457: Confusing information in Installed Extensions after migrating from 4.5.4 to 5.2M2.

* Fix pom.xml for xwiki-enterprise-ui-mainwiki-all & xwiki-enterprise-ui-wiki-all.
XWIKI-9457: Confusing information in Installed Extensions after migrating from 4.5.4 to 5.2M2.

* Fix pom.xml for xwiki-enterprise-ui-mainwiki-all & xwiki-enterprise-ui-wiki-all.