webadmin: Fix VM pop-up Host tab

In the VM pop-up view, host tab - the logic of the UI visibility and
availability is wrong.

CPU pinning topology textbox should always be visible.
Both 'Use Host CPU' and 'CPU Pinning topology' are unavailable for
clusters with compatibility version under 3.2.

Logic of the flags 'Use Host CPU' and 'CPU Pinning topology' should be
as follows:

A = 'cpu pinning' available
B = 'use host cpu' available

For RHEV:
                              Any                 Selected
                              Host                   Host
-------------------------------------------------------------
Allow auto migration
Allow Man. migration           B
Do not allow migration         B                     A+B

For oVirt:
                              Any                 Selected
                              Host                   Host
-------------------------------------------------------------
Allow auto migration                                  A
Allow Man. migration           B                      A
Do not allow migration         B                     A+B

Change-Id: Ibe691e0292a6bf99521629f04d292698ba1027e5
Bug-Url: https://bugzilla.redhat.com/905831
Signed-off-by: Ofri Masad <omasad@redhat.com>