2352: Add state to pipeline_instance. Db migration and unit testing.
Set state during save
Rename is_ready method to components_look_ready? and add additional tests for state change.
Use the renamed components_look_ready? method during migration.
Merge branch 'master' into 2352-phased-pipeline-instance-state
Merge branch 'master' into 2352-phased-pipeline-instance-state
Story 2352: Adding state and components_summary is completed.