+++ This bug was initially created as a clone of Bug #906302 +++
Description of problem:
Reported by aortega. Regardless of an image's disk and RAM requirements, all flavors are available in the drop-down menu when Launching an instance. Therefore you can end up using e.g. a m1.tiny flavour with 512Mb RAM with an image that requires at least 2Gb of RAM.

Version-Release number of selected component (if applicable):
python-django-horizon-2012.2.1-2.el6ost.noarch

How reproducible:
Always

Steps to Reproduce:
1. Create a new image, setting the minimum RAM requirement to 2048MB
2. After the image is uploaded, try to Launch it
  
Actual results:
The flavor selected by default is m1.tiny, which doesn't actually provide enough RAM for the image.
After clicking Launch, the instance fails to launch with an error "Instance type's memory is too small for requested image. (HTTP 400)"

Expected results:
Horizon should default to an appropriate flavor, and probably prevent the user from launching an image with a flavor that doesn't meet the image's requirements.
The UI should also be enhanced to display the image's requirements. At the moment, there is no indication what an image's requirements are when launching a new instance.