support for Keystone v3 authentication

This adds the class Puppet::Provider::Openstack::CredentialsV3
that implements support for Keystone v3 authentication and all
of the new id and domain authentication parameters.

Implements: blueprint api-v3-support

Change-Id: Icafc4cb8ed000fd9d3ed6ffde2afe1a1250d90af

lib/puppet/provider/openstack/credentials.rb

@@ -54,3 +54,36 @@ end
 
 class Puppet::Provider::Openstack::CredentialsV2_0 < Puppet::Provider::Openstack::Credentials
 end
+
+class Puppet::Provider::Openstack::CredentialsV3 < Puppet::Provider::Openstack::Credentials
+
+  KEYS = [
+    :cacert,
+    :cert,
+    :default_domain,
+    :domain_id,
+    :domain_name,
+    :key,
+    :project_domain_id,
+    :project_domain_name,
+    :project_id,
+    :trust_id,
+    :user_domain_id,
+    :user_domain_name,
+    :user_id
+  ]
+
+  KEYS.each { |var| attr_accessor var }
+
+  def self.defined?(name)
+    KEYS.include?(name.to_sym) || super
+  end
+
+  def user_password_set?
+    return true if (@username || @user_id) && @password && (@project_name || @project_id) && @auth_url
+  end
+
+  def initialize
+    set(:identity_api_version, version)
+  end
+end

spec/unit/provider/openstack/credentials_spec.rb

@@ -60,4 +60,33 @@ describe Puppet::Provider::Openstack::Credentials do
       end
     end
   end
+
+  describe 'using v3' do
+    let(:creds) do
+      creds = Puppet::Provider::Openstack::CredentialsV3.new
+    end
+    describe 'with v3' do
+      it 'uses v3 identity api' do
+        creds.identity_api_version == '3'
+      end
+    end
+    describe '#password_set? with username and project_name' do
+      it 'is successful' do
+        creds.auth_url = 'auth_url'
+        creds.password = 'password'
+        creds.project_name = 'project_name'
+        creds.username = 'username'
+        expect(creds.user_password_set?).to be_truthy
+      end
+    end
+    describe '#password_set? with user_id and project_id' do
+      it 'is successful' do
+        creds.auth_url = 'auth_url'
+        creds.password = 'password'
+        creds.project_id = 'projid'
+        creds.user_id = 'userid'
+        expect(creds.user_password_set?).to be_truthy
+      end
+    end
+  end
 end