Description of problem:

When creating a new container that requires a Docker image to be
  pulled down into the compute resource (e.g. choosing either the
  'Docker Hub' or external 'Registry' and typing the name of an image
  that is not yet present in the compute resource), there's no visual
  information to the end user that something is happening and you're
  only redirected to the new container page once the image is pulled
  down. We need to handle this scenario the same way that we handle
  provisioning hosts and display progress like the orchestration
  progress bar displayed during host creation.

Please refer to https://bugzilla.redhat.com/show_bug.cgi?id=1204925

Version-Release number of selected component (if applicable):

* Satellite-6.1.0-RHEL-7-20150324.0

How reproducible:


Steps to Reproduce:
1. Create a Docker-based compute resource
2. Create a New Container and choose the Docker Hub tab after selecting your compute resource
3. Type 'wordpress' then click the search button (magnifying glass icon) to trigger a fetch to Docker Registry
4. Select a valid Tag and complete the wizard

Actual results:

Upon finishing the wizard, the user is not taken to the new container page until the 'wordpress' image is pulled down onto the computer resource.


Expected results:

* The user should be taken immediately to the new container page.
* The 'Power On' button should be disabled until the docker image has been pulled and is ready.

Additional info: