Upgrade pymongo usage from deprecated connection to client
LMS-1551
Change mitx.db to edx.db for dev sqlite
update LocMemCache location to use edx instead of mitx
Merge pull request #1879 from edx/db/mitx-edx-sqlite

Change mitx.db to edx.db for dev sqlite
Merge pull request #1880 from edx/db/mitx-edx-locmem

update LocMemCache location to use edx instead of mitx
On export error, handle quotes within string.

STUD-1013
import GlobalStaff to legacy.py (LMS-1599)
Merge pull request #1869 from edx/christina/export-error

On export error, handle quotes within string.
Disabled AJAX Errors Course Overview JS test
Merge pull request #1881 from edx/adam/fix/instr-dash-500

import GlobalStaff to legacy.py (LMS-1599)
Shorten collection name to keep index name w/in limit
Merge pull request #1884 from edx/will/disable-js-course-overview-test

Disabled AJAX Errors Course Overview JS test
Merge pull request #1878 from edx/dhm/pymongo_client

Upgrade pymongo usage from deprecated connection to client