Checkout 'master' branch in case of merge events and checkout 'tmp-build-branch' in case of pull requests
Checkout 'master' branch in case of merge events and checkout 'tmp-build-branch' in case of pull requests

Change-Id: I9a460ce9fb4b33bb5d6ce0c3f28673dab5742e93

yahoo/omid,yahoo/omid,yonigottesman/incubator-omid,yonigottesman/incubator-omid