SERVER-12952 do less work for non-matching index docs
SERVER-12841 upgrade checker gives better errmsg for documents with unindexable _ids
SERVER-12809 fix upgradechecker's index key size check
SERVER-8391 upgradechecker now supports database or collection as argument
SERVER-12127 migrate js tests to jscore suite when not related to writes

Temporarily put back jstest in order not to lose test coverage
SERVER-12935 override OR child indexOnly when explaining non-covered queries
SERVER-12607 make [update/delete] write commands interruptable with killOp
SERVER-12985 fix display index name

Signed-off-by: Matt Kangas <matt.kangas@mongodb.com>
SERVER-12529 fix explain output for nscannedObjects on $or

Signed-off-by: Matt Kangas <matt.kangas@mongodb.com>
SERVER-12950 don't mark writes as completed after errors in ordered batch
SERVER-12127 migrate js tests to jscore suite when not related to writes

Migrate js tests starting from j-z.
Include SERVER-12920 Update use_power_of_2.js

Signed-off-by: Matt Kangas <matt.kangas@mongodb.com>
SERVER-12127 Temporarily put back jstest in order not to lose test coverage.

Signed-off-by: Matt Kangas <matt.kangas@mongodb.com>
Merge remote-tracking branch 'upstream/master'