wedadmin: Trusted Compute Pools - Open Attestation integration with oVirt engine proposal

In this patchset, follow changes has been introduced:
1. Divide "cluster policy" side tab into two sections, "scheduling policy" and "additional properties" with an "Enable Trusted Service" checkbox.
2. Fix bug1: can't save cluster when not click Trusted service button.
3. Fix bug2: when click Trusted service must click Virt service.
4. Fix bug3: host existed in the cluster, disable the function for switching between trust cluster and non-trust cluster, and also, we will write log message.

Change-Id: I59396a68708797b868bcd871abb08b3dd514f757
Signed-off-by: Jimmy <gang.wei@intel.com>
Signed-off-by: Zhang Lijuan <lijuan.zhang@intel.com>
Signed-off-by: Dave Chen <wei.d.chen@intel.com>
Signed-off-by: Quan Xu <quan.xu@intel.com>
Signed-off-by: Dave Chen <wei.d.chen@intel.com>