Add openstackclient installation to the client class

The repo is inside the openstackclient plugin commands[1].

[1]https://docs.openstack.org/python-openstackclient/latest/cli/plugin-commands.html

Change-Id: I2d15a0b30394e9187bda81f5dcb0074d579574c5

manifests/client.pp

@@ -19,4 +19,6 @@ class mistral::client(
     name   => $::mistral::params::client_package,
     tag    => ['openstack', 'mistral-package'],
   }
+
+  include '::openstacklib::openstackclient'
 }

releasenotes/notes/add-openstackclient-client-af0f5c3f707e1f49.yaml

@@ -0,0 +1,3 @@
+---
+features:
+  - Add openstackclient installation to the client class.

spec/classes/mistral_client_spec.rb

@@ -14,6 +14,8 @@ describe 'mistral::client' do
         :tag    => ['openstack', 'mistral-package']
       )
     end
+
+    it { is_expected.to contain_class('openstacklib::openstackclient') }
   end
 
   on_supported_os({