webadmin: cpu pinning visibility in vm dialog

Fix showing CPU pinning section when the VM:
* Respective to CpuPinningEnabled, CpuPinMigrationEnabled
* Pinned
* Assigned to host & admin-migration & cpu-host are checked

Change-Id: I7343e94f6133f0ad796b5446718af98dcd734c30
Bug-Url: https://bugzilla.redhat.com/867039
Signed-off-by: Gilad Chaplik <gchaplik@redhat.com>