Exit plugins can now fail the build.
All exit plugins are run at the end of the build regardless of whether the build has failed. Exit plugin failures for plugins marked as required for a successful build would previously not cause the build to fail, but they now do.
koji_promote: now accepts optional target parameter
pull_base_image: this plugin is no longer added if missing
tag_and_push: this plugin is no longer added if missing
docker build: fix logging so that it is properly decoded from JSON
koji_promote: use component, not name, to determine the name-version-release for the Koji build.
add_filesystem: new plugin for creating base images via Koji
store originating Koji task ID in Koji build metadata
show upload progress in log output
store resulting Koji build ID as OpenShift build label