Remove  useLatestSuffixInPdfUrl

Remove useLatestSuffixInPdfUrl from Admin User, it's not needed
for OpenStack manuals.

This is related to bug #1215241

Change-Id: I40622ee9a31aba98875f97a2e2c1c8654424709e
Modify the PLUMgrid plugin path in documentation

Fix bug #1217045

Change-Id: I29cf92b49a7582c80881d1a84b885d0a090bc3ba
Merge "Remove  useLatestSuffixInPdfUrl"
Merge "Modify the PLUMgrid plugin path in documentation"