SERVER-13635 Clean up BtreeCursor save/restore.

It is now up to the BtreeInterface impl to decide what data it needs to save.
Save and restore must *always* be called before/after a yield if you intend
to use the cursor again, even if it is at EOF.
SERVER-13635 Capped HeapRecordStore fixes
SERVER-14006 Partition the experimental lock manager

This allows the experimental document-level locking to scale past 4x
cores.
SERVER-14189 Fixed invalid iterator decrement
SERVER-13635 RIP pdfile.h/cpp
SERVER-11077 Debian Enterprise packaging

This is a minimal change to support Debian, almost
identical to Ubuntu packaging and Community Debian
packaging.
LockManager fixes and cleanup
Merge branch 'master' of github.com:mongodb/mongo
SERVER-14349 problem with changing lock manager policy
SERVER-13635: remove verify in index_create that only makes sense for some indexes
SERVER-13635: allow OperationContextNoop to get a RecoveryUnit passed in for testing
SERVER-14352: prototype rocksdb storage engine
SERVER-14349 problem with lock_mgr_test on windows
SERVER-4042 convert HashTable::iterAll to use stdx::bind instead of function callback

Signed-off-by: Benety Goh <benety@mongodb.com>
SERVER-14357: Add support for top level JSON Array
SERVER-14147 fix index_multi.js retry by passing the correct noConnect value
SERVER-14317 remove extraneous check in idhack runner
SERVER-14315 Support MinKey and MaxKey extended JSON objects in JSON parser
SERVER-14118 Added  ability to  detect if _id is missing when  passing an object to rs.add, if missing add it automatically  as if it was a string that had been passed.

Signed-off-by: Benety Goh <benety@mongodb.com>
SERVER-14118 omit _id from rs.add() configuration document in test