Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1286033
Description of problem:
in Web UI go to Infrastructure -> "Compute Profile" -> Select a RHEV Compute resource. In the section "Volumes" check the box for "Preallocate Disk" and click "Submit". If you re-edit this profile, checkbox is unchecked again.

Version-Release number of selected component (if applicable):
Satellite 6.1.4

How reproducible:
always

Steps to Reproduce:
1. Go to Infrastructure -> Compute Resources
2. Add a RHEV-M Compute resource
3. Go to Infrastructure -> Compute Profile
4. Select a Profile
5. Select the RHEV-M Compute resource
6. Add a Volume and Check "Preallocate Disk"
7. Save the profile
8. Edit the profile again

Actual results:
The Checkbox "Preallocate Disk" is again unchecked

Expected results:
The checkbox should remain checked.

Additional info:
There is a similiar foreman-bug upstream:
http://projects.theforeman.org/issues/9932