SERVER-13645 eliminate is_master.h
SERVER-14274 SERVER-14135 implement awaitReplication() in LegacyReplicationCoordinator
SERVER-14275 SERVER-14135 implement setLastOptime() in LegacyReplicationCoordinator
SERVER-14312 fix a failure mode of reconfig.js
SERVER-14308 eliminate majority.js
SERVER-14135 implement processReplSetGetStatus() in LegacyReplicationCoordinator