plugins/jenkins: allow arbitrary remote trigger token
plugins/github: simple push payload handling
plugins/github: log info for no regex fell through into wrong scope, moved log params into var
moved push-found logic into jenkins

1. to conform to the way that the plugin is set up now
2. github plugin just validates that the push event is good to go
plugins/jenkins: update config to push_projects, trigger build
plugins/jenkins: trigger build with [corrected] BRANCH_NAME, before & after SHAs
plugins/jenkins: update reference to push_projects
plugins/jenkins: update sample config schema & correct config usage
plugins/jenkins: add debug for triggerBuild
plugins/jenkins: add token & cause to trigger build call
plugins/jenkins: add error log