Description of problem:
rhvm GUI do not prompt message like "changes need vm restart" when the changes can not take effect immediately 

Version-Release number of selected component (if applicable):
ovirt-engine-4.2.2.1-0.1.el7.noarch

How reproducible:
100%

Steps to Reproduce:
1. Register and host with numa node>1 to rhv server

2. Create an vm, then edit the vm from edit the VM.  
In 'System' page, set the Total Virtual CPUs to be 10
In "Host" page, set the vm "start Running on" the numa host

3. start the guest
Edit the vm, in "Host" page, 
change the Migration options to be "do not allow migration"
"Configure NUMA" -> "NUMA node count" as 2 (it will configure guest with 2 numa nodes)
Click the "NUMA pinning", on the NUMA Topolopy page, drag the vNUMA to NUMA node to pin the vNUMA to that node
pin vNUMA 0 to NUMA 0, and vNUMA1 to NUMA 1
click ok

4.  check the guest xml on host, the guest still has only 1 node and do not pin to any host NUMA node
# virsh dumpxml rhel 
...
 <numa>
      <cell id='0' cpus='0-9' memory='1703936' unit='KiB'/>
    </numa>
...

Actual results:
In step 3, after click "OK"  the setting can be saved, but no warning to indicate that such setting will take effect on next boot.


Expected results:
When click "OK" to save the setting, there should be a dialog box to inform the user that such setting will take effect on next boot, like:
"
Changes that require VM restart:
numa pin
numa node count
....
"