use disable_refs (bug 919148)
Merge pull request #1181 from andymckay/919148

use disable_refs (bug 919148)
explicitly cache counts for collection listings (bug 912484)
Add header to API responses indicating whether the request was pinned to the master database
Merge pull request #1185 from chuckharmston/918124-collections_api_pinning

Add header to API responses indicating whether the request was pinned to the master database (bug 918124)
reinstate confusing line of code that is apparently uncovered by tests
skip test on jenkins that only fails on jenkins
Added transaction API for Monolith (bug 920069)