Add cinder CLI tests "qos-list" and "encryption-type-list"

Below two tests are added for cinder cli:
qos-list
encryption-type-list

Change-Id: Ic025ec401135b1de64871ef1df368cd13f85f7a3
diff --git a/tempest/cli/simple_read_only/test_cinder.py b/tempest/cli/simple_read_only/test_cinder.py
index 723333b..9001302 100644
--- a/tempest/cli/simple_read_only/test_cinder.py
+++ b/tempest/cli/simple_read_only/test_cinder.py
@@ -118,6 +118,12 @@
     def test_cinder_bash_completion(self):
         self.cinder('bash-completion')
 
+    def test_cinder_qos_list(self):
+        self.cinder('qos-list')
+
+    def test_cinder_encryption_type_list(self):
+        self.cinder('encryption-type-list')
+
     def test_admin_help(self):
         help_text = self.cinder('help')
         lines = help_text.split('\n')