improve search
[#330] fix searh api
[#330] small refactoring
Merge pull request #431 from abf/rosa-build:330-improve_search
 #330 improve search
fix pull request blob & commit links
fix blob path
refactoring
Merge pull request #434 from abf/rosa-build:fix_pull_request_blob_and_commit_links
 Fix pull request blob & commit links
Merge branch 'master' into 432-repositories-with-empty-metadata
#432: cleanup, added specs for CreateEmptyMetadataJob