[#200] fix dublication messages & activity after creating pull request
[#200] fix sending message to pull assignee
[#200] optimize after commit issue callback
[#200] add some specs
[#200] add specs to pull request api
add sort for refs on creating pull request
Merge pull request #215 from abf/rosa-build:sort_refs_on_creating_pull
 add sort for refs on creating pull request
[#200] fix callbacks & add some specs
[#200] add update assignee issue spec
Fixed link for cleaning of platform
Merge pull request #217 from abf/rosa-build:fix-platform-clean
 Fix: cleaning of platform
Merge pull request #216 from abf/rosa-build:fix_activity_for_pull_requests
  fix dublication messages after creation pull request