Description of problem:
I imported an EC2 AMI via the web UI, and when I landed on the deployable page, I was unable to launch it. It looks like @catalog is nil (because it's only set if params[:catalog_id] is there) and we thus grey out the button. We show that the image is ready, though.

We either need to change the redirect to that page to include catalog_id, or we need to find another way of setting @catalog.


Version-Release number of selected component (if applicable):
HEAD as of commit 2bbd6bb57f3bedb2ac89fe6e891218da7912f55c


Steps to Reproduce:
1. Import an image (I used an EC2 AMI) via the web UI
2. Build a deployable
3. Look at launch button
  

Actual results:
Button is disabled.


Expected results:
Button is enabled, because the image is ready to launch.