SERVER-15780 more/improve thread naming
SERVER-15949:add diagnostics to network executor
SERVER-15951 CollectionLock should check entire lock heirarchy, not just DB lock
SERVER-14425: fix WriteConflictException handling in multi-update
SERVER-14860: fix multi-index build transactionality around setIndexIsMultikey
SERVER-15892: catch WriteConflictException in findAndModify
SERVER-15948 Fix tests inserting duplicate ts's into oplog
SERVER-15948 Fast OplogStart impl for RSs supporting arbitrary DiskLocs

Storage engines must opt-in to this functionality. For now, heap1 is the only
one to do so.
SERVER-15665 MMAP v1 requests yields during page faults via NEED_FETCH
SERVER-15948 add missing files
SERVER-15780: move client init before opCtx
Revert "SERVER-15905 Ensure Initial Sync uses the same source when fetching oplog and missing docs"

This reverts commit d204985463cd731d16190fd79621e227850d9c84.
SERVER-15948 Update tests to new definition of isOplog
SERVER-14425: add 2 more update serializability tests
Merge branch 'master' of https://github.com/mongodb/mongo into tokuft