Fix test_cinder_services

Related-PROD: PROD-21985

Change-Id: I9cdd1508cbb1aaf78b2e9dd622cfc522c163ada2
diff --git a/cvp_checks/tests/test_cinder_services.py b/cvp_checks/tests/test_cinder_services.py
index 2117f6f..20bd17d 100644
--- a/cvp_checks/tests/test_cinder_services.py
+++ b/cvp_checks/tests/test_cinder_services.py
@@ -2,19 +2,28 @@
 
 
 def test_cinder_services(local_salt_client):
-    service_down = local_salt_client.cmd(
+    cinder_backends_info = local_salt_client.cmd(
         'cinder:controller',
+        'pillar.get',
+        ['cinder:controller:backend'],
+        expr_form='pillar')
+    if not cinder_backends_info:
+        pytest.skip("Cinder is not found on this environment")
+    service_down = local_salt_client.cmd(
+        'keystone:server',
         'cmd.run',
         ['. /root/keystonerc; cinder service-list | grep "down\|disabled"'],
         expr_form='pillar')
-    if not service_down:
-        pytest.skip("Cinder is not found on this environment")
     cinder_volume = local_salt_client.cmd(
         'keystone:server',
         'cmd.run',
-        ['. /root/keystonerc; cinder service-list | grep "volume" | wc -l'],
+        ['. /root/keystonerc; cinder service-list | grep -c "volume"'],
         expr_form='pillar')
+    backends_cinder = cinder_backends_info[cinder_backends_info.keys()[0]]
+    backends_num = len(backends_cinder.keys())
     assert service_down[service_down.keys()[0]] == '', \
         '''Some cinder services are in wrong state'''
-    assert cinder_volume[cinder_volume.keys()[0]] == '1', \
-        '''There are more than 1 host/backend for cinder'''
+    assert cinder_volume[cinder_volume.keys()[0]] == str(backends_num), \
+        'Number of cinder-volume services ({0}) does not match ' \
+        'number of volume backends ({1})'.format(
+        cinder_volume[cinder_volume.keys()[0]], str(backends_num))