Description of problem:
https://translate.zanata.org/zanata/admin/usermanager page is not doing pagination and now it's unable to open
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Log in as admin to translate.zanata.org
2. Go to https://translate.zanata.org/zanata/admin/usermanager
504 Gateway Time-out
The server didn't respond in time.
See the page.
VERIFIED with Zanata 3.4.2-SNAPSHOT (git-server-3.4.1-11-gd9676de)