testing: renamed the action struct.
testing: implemented FakeProvisioner ExecutedPipeline.

related to #613.
app: simplified the ProvisionerDeploy tests.

related to #613.
testing: added a way to enable and disable a custom pipeline.

related to #613.
app: support custom deploy pipelines.

related to #613.
docker: added action for inject environs.

related to #613.
docker: implemented forward for injectEnvirons.

related to #613.
docker: checking params for injectEnvirons action.

related to #613.
docker: added saveContainers action.

related to #613.
docker: renamed action to saveUnits.

related to #613.
docker: implemented saveUnits Forward.

related to #613.