Get all PRs from search if paginated
Incomplete retry logic (might not be used)
Merge branch 'master' into job_retries

Conflicts:
	lib/lollibot/repository.rb
Retry jobs a specified number of times in case false-negatives occur
Add retry success logging
DRY MergeChecker Tests
InvalidConfig extends StandardError
Add further retry logging
Save jobs_retried to DB
Remove duplicate mock line
Merge pull request #3 from BBC-News/job_retries

Job retries