- It is not possible to create a site if a same-named site has not been deleted and purged
- Before this change came in, there were cases where sites had been created while same-named sites existed in the trashcan
- Purging those sites was detrimental to the live sites
- Added the workaround and associated test as suggested by Andrea on MNT-16271
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/DEV/5.2.N/root@133079 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261