SERVER-14690 fix no_chaining.js flakiness
SERVER-14582 Make ReplSetTest.waitForIndicator work with auth when primary is down
SERVER-14685 Wait for balancing and replication in sharding/auth.js test
SERVER-14181: Test Hang Analyzer
A prototype hang analyzer for MCI integration to help investigate test
timeouts.

1. Script supports taking dumps, and/or dumping a summary of useful
information about a process
2. Script will iterate through a list of interesting processes (mongo,
mongod, and mongos), and run the tools from step 1.

Supports Linux, MacOS X, and Windows.
BUMP 2.7.4
Merge remote-tracking branch 'upstream/master'