Atomic-reactor

Build JSON API changes
- none

Bug fixes
- koji_promote: submit correct start time

Improvements
- base image build improvements: default config and kickstart, documentation

Build JSON API changes
- none

Bug fixes
- read image labels from Config.Labels, ignore ContainerConfig

Improvements
- defer image removal until build finishes where appropriate
- pulp_push: fall back to uploading full compressed tarball when layer deduplication fails

Build JSON API changes
- 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

Bug fixes
- 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.

Improvements
- add_filesystem: new plugin for creating base images via Koji
- koji_promote:
- store originating Koji task ID in Koji build metadata
- show upload progress in log output
- store resulting Koji build ID as OpenShift build label
- tag build in Koji if target provided

Build JSON API changes
- 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.
- `add_yum_repo_by_url`: new optional `inject_proxy` parameter
set proxy server for this repo

Bug fixes
- `store_metadata_in_osv3`: added missing import of docker module

Improvements
- when cloning the git repository, try using shallow clone (`--depth=1`) first
- `push_to_pulp`: strip layers already present in Pulp before uploading the tarball
- `koji_promote`: some fixes regarding naming of uploaded files