Add support for coordination parameters

The tooz library was introduced to Manila a while ago[1]. This change
adds the new manila::coordination class to manage coordination
parameters and backend packages.

[1] 326755f42ccf0385a02db37e734251860d81b00d

Depends-on: https://review.opendev.org/791628
Change-Id: I1a4c342a1d7876762af51d2c8bef87881719e598

manifests/coordination.pp

@@ -0,0 +1,20 @@
+# == Class: manila::coordination
+#
+# Setup and configure Manila coordination settings.
+#
+# === Parameters
+#
+# [*backend_url*]
+#   (Optional) Coordination backend URL.
+#   Defaults to $::os_service_default
+#
+class manila::coordination (
+  $backend_url = $::os_service_default,
+) {
+
+  include manila::deps
+
+  oslo::coordination{ 'manila_config':
+    backend_url => $backend_url
+  }
+}

releasenotes/notes/coordination-07f3f700248c38fb.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    The new ``manila::coordination`` class has been added.

spec/classes/manila_coordination_spec.rb

@@ -0,0 +1,39 @@
+require 'spec_helper'
+
+describe 'manila::coordination' do
+  shared_examples 'manila::coordination' do
+    context 'with default parameters' do
+      it {
+        is_expected.to contain_oslo__coordination('manila_config').with(
+          :backend_url => '<SERVICE DEFAULT>'
+        )
+      }
+    end
+
+    context 'with specified parameters' do
+      let :params do
+        {
+          :backend_url => 'etcd3+http://127.0.0.1:2379',
+        }
+      end
+
+      it {
+        is_expected.to contain_oslo__coordination('manila_config').with(
+          :backend_url => 'etcd3+http://127.0.0.1:2379'
+        )
+      }
+    end
+  end
+
+  on_supported_os({
+    :supported_os => OSDefaults.get_supported_os
+  }).each do |os,facts|
+    context "on #{os}" do
+      let (:facts) do
+        facts.merge(OSDefaults.get_facts())
+      end
+
+      it_behaves_like 'manila::coordination'
+    end
+  end
+end