update 'githubPullRequest' to 'pullRequest' in Job DSL section
update 'githubPullRequest' to 'pullRequest' in Job DSL section

mmitche/ghprb,arcadia/ghprb-plugin,ithaka/ghprb-plugin,arcadia/ghprb-plugin,mmitche/ghprb,jenkinsci/ghprb-plugin,janinko/ghprb,fbelzunc/ghprb-plugin,dulvac/ghprb-plugin,fbelzunc/ghprb-plugin,ithaka/ghprb-plugin,DavidTanner/ghprb-plugin,DavidTanner/ghprb-plugin,dulvac/ghprb-plugin,janinko/ghprb,jenkinsci/ghprb-plugin