Description of problem:
Right now only templates build f13 x86_64 images.  Currently the UI allows the user to add i386 hw profiles and select them when creating instance which will fail due to the hw profile mismatch between the template and the hw profile.  

We should prevent the user from adding i386 hw profiles since they are not supported and could confuse the user into a situation that we do not give good feedback as to what the error is.

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


How reproducible:


Steps to Reproduce:
1.  add a i386 hw profile
2.  create/build a x86_64 template
3.  create a instance using values from steps 1 & 2
  
Actual results:
build errors out but gives no indication to the user as to why

Expected results:
feedback saying that there is a hw profile mismatch thus preventing the instance from being created

Additional info: