SERVER-14278 Additional testing for $push with $sort

Signed-off-by: Benety Goh <benety@mongodb.com>
SERVER-14280 more tests for regex query with positional operator update

Signed-off-by: Benety Goh <benety@mongodb.com>
SERVER-12642 validates input to the distinct command

Signed-off-by: Benety Goh <benety@mongodb.com>
SERVER-9032: Validate locale on startup

On some Linux machines, users may have not have a locale set which will
cause boost to fail. Validate that the user has a locale set, and if not,
give a useful error message, and exit.
Revert "SERVER-12642 validates input to the distinct command"
SERVER-12642 validates input to the distinct command

Signed-off-by: Matt Kangas <matt.kangas@mongodb.com>
SERVER-14286 Additional tests for updates and findAndModifys that touch _id

Signed-off-by: Benety Goh <benety@mongodb.com>
SERVER-14190 fix possible non-null terminated string in mongorestore
SERVER-14135 Implement some simple methods in ReplicationCoordinatorImpl
SERVER-14276 SERVER-14135 Implement and hook up stepDown functionality in LegacyReplicationCoordinator