Add libvirt API acl test case for virsh snapshot-create-as

Update virsh snapshot-create-as test case for test API 'snapshot' in
virDomainPtr set.

Signed-off-by: Wayne Sun <gsun@redhat.com>
Add libvirt API acl test case for virsh find-storage-pool-sources

Update virsh find-storage-pool-sources test case for test API
'detect-storage-pools' in virConnectPtr set.

Signed-off-by: Wayne Sun <gsun@redhat.com>
Add libvirt API acl test case for virsh net-define and net-undefine

Update virsh_net_define_undefine test case for test API
'save', 'write' and 'delete' in virNetworkPtr set.

Signed-off-by: Wayne Sun <gsun@redhat.com>
Add libvirt API acl test case for virsh net-destroy

Update virsh net-destroy test case for test API 'stop' in virNetworkPtr
set.

Signed-off-by: Wayne Sun <gsun@redhat.com>
Add libvirt API acl test case for virsh net-start

Update virsh net-start test case for test API 'start' in virNetworkPtr set.

Signed-off-by: Wayne Sun <gsun@redhat.com>