Ensure that swiftclient is installed

It's possible for glance-api to get stuck in a loop starting when
the backend is swift, and python-swiftclient is not present on
the system.

Depends-On: I65fb0736e9fa9e68c3c7877cf6caf228c49eb82d
Change-Id: I1eeb9f12cf82961ae820067ad8fe91d096d1d6e1
Closes-bug: #1632143

manifests/backend/swift.pp

@@ -70,6 +70,9 @@ class glance::backend::swift(
 ) {
 
   include ::glance::deps
+  include ::swift::client
+  Class['swift::client'] -> Anchor['glance::install::end']
+  Service<| tag == 'swift-service' |> -> Service['glance-api']
 
   glance_api_config {
     'glance_store/swift_store_region':         value => $swift_store_region;

metadata.json

@@ -59,6 +59,10 @@
       "name": "puppetlabs/stdlib",
       "version_requirement": ">=4.2.0 <5.0.0"
     },
+    {
+      "name": "openstack/swift",
+      "version_requirement": ">=9.4.0 <10.0.0"
+    },
     {
       "name": "openstack/openstacklib",
       "version_requirement": ">=9.4.0 <10.0.0"

spec/classes/glance_backend_swift_spec.rb

@@ -15,6 +15,8 @@ describe 'glance::backend::swift' do
 
     describe 'when default parameters' do
 
+      it { is_expected.to contain_class 'swift::client' }
+
       it 'configures glance-api.conf' do
         is_expected.to contain_glance_api_config('glance_store/default_store').with_value('swift')
         is_expected.to contain_glance_api_config('glance_store/swift_store_large_object_size').with_value('<SERVICE DEFAULT>')