cleanup notifier default variables
Keep more than last log.
Making settings a settable var by convention.
Updating change log.
Merge pull request #1366 from edx/e0d/settings-as-upper

Making settings a settable var by convention.
Add rate limiting to the lms course urls.
Reduce the request limit.
Externalize the rate limiting settings to vars.
fixing syntax error, adding sleep
Merge pull request #1510 from edx/jarv/fix-db-clone

fixing syntax error, adding sleep
Merge pull request #1508 from edx/e0d/keep-sync-logs

Keep more than last log.
Update cms/lms log format.
Disable by default.
Merge pull request #1511 from edx/feanil/ip_logging

Update cms/lms log format.
Merge pull request #1512 from edx/feanil/nginx_rate_limiting

Feanil/nginx rate limiting
updating the clone script to use the right xqueue db host

Only updating python-mysql if we aren't on jenkins
clarifying comment
Merge pull request #1514 from edx/jarv/check-for-jenkins

Jarv/check for jenkins
include aws unconditionally
Merge pull request #1506 from edx/derf/notifier-role-cleanup

cleanup notifier default variables