Osra282 implement pagination

Finished this sub-task for pagination & Display the number of pages total.
 https://osraav.atlassian.net/browse/OSRA-282

That is the Active Admin version of partners. The Rails version calls 17 records. I can change Active Admin or both versions according to the team consensus. However pagination needs at least 2 pages to work with - preferably 3 IMHO.