Allow simple sms rate limiting
Add sms load balancing
Add form mixin for managing the load balancing phone numbers
Small fix
Add rate limiting for Mach backend
PR feedback
Rename file
SQL form completion time report
add CompletionOrSubmissionTimeFilter
replace old report with new report
sql FormCompletionVsSubmissionTrendsReport
replace old report with new
Merge pull request #3458 from dimagi/sqlfct

sql FormCompletionVsSubmissionTrendsReport
Merge pull request #3457 from dimagi/sqlformcompletiontime

SQL form completion time report
Merge pull request #3479 from dimagi/sms-load-balance

SMS Rate Limiting and Load Balancing
Merge master