SERVER-10437 remove chaining.js test

It is testing functionality that has been deprecated by the new sync source updater.
Also, tags.js covers testing chaining with network failures, so there is no further
need for this test.  chaining.js is racy with respect to the way it activates a
failpoint in the socket class, which was causing the test to fail sometimes.
SERVER-10429 disable flaky test until we can fix it properly
SERVER-10159 Hoist modifier parsing out of the write lock for update
SERVER-9518 Initialize user cache on process startup
SERVER-9518 SERVER-10420 Only initialize all user data at process startup if we're running in auth mode
SERVER-10420 Skip jstests/sharding/replmonitor_bad_seed.js until we no longer initilize all user data at process startup
SERVER-10026 SERVER-10376 scrub clientcursor vigorously
SERVER-10026 SERVER-10376 getMore and invalidation and clientCursor
SERVER-10026 rename Runner to TestRunner to avoid naming conflict