Add region support to credentials

This fixes the credentials classes to properly accept region as a
property to manage.  This allows OS_REGION_NAME to be set properly if
the child class passes it in.

Change-Id: I3345dac8bebd68f93290c1d45aa9a4d80bf3fb34
Partial-Bug: #1517220

lib/puppet/provider/openstack/credentials.rb

@@ -6,7 +6,8 @@ class Puppet::Provider::Openstack::Credentials
   KEYS = [
     :auth_url, :password, :project_name, :username,
     :token, :url,
-    :identity_api_version
+    :identity_api_version,
+    :region_name
   ]
 
   KEYS.each { |var| attr_accessor var }

releasenotes/notes/support_region_name_in_providers-cde6d75f0ddbec28.yaml

@@ -0,0 +1,4 @@
+---
+fixes:
+  - Add support for multiple regions in base provider code used by other puppet
+    modules.

spec/unit/provider/openstack/credentials_spec.rb

@@ -114,6 +114,7 @@ describe Puppet::Provider::Openstack::Credentials do
         creds.token = 'token'
         creds.url = 'url'
         creds.identity_api_version = 'identity_api_version'
+        creds.region_name = 'Region1'
         expect(creds.to_env).to eq({
           'OS_USERNAME'             => 'username',
           'OS_PASSWORD'             => 'password',
@@ -121,7 +122,8 @@ describe Puppet::Provider::Openstack::Credentials do
           'OS_AUTH_URL'             => 'auth_url',
           'OS_TOKEN'                => 'token',
           'OS_URL'                  => 'url',
-          'OS_IDENTITY_API_VERSION' => 'identity_api_version'
+          'OS_IDENTITY_API_VERSION' => 'identity_api_version',
+          'OS_REGION_NAME'          => 'Region1',
         })
       end
     end