SERVER-12274 use new code for wmode tests
SERVER-11875 Convert remaining internal writes to use write commands
SERVER-11875 Make sure write concern is set before getting the value
SERVER-12329 UpdatedExisting always true after update command
SERVER-12324 replaced std::stream with str::stream in db/query and db/exec
SERVER-11767 allow more time for records to replicate, on slower builders
SERVER-8871 admin hints
SERVER-11681 remove unneeded WBL warning (current code was causing compilation warning)
SERVER-11875 revert distlock conversion
SERVER-12328 remove plans from the cache if they are not performant
Merge remote-tracking branch 'upstream/master'