Enable acceptance tests for openstack_config

With the keystone_config provider inheriting from the openstack_config
provider we can now add acceptance tests in openstacklib to be sure that
all the dependant providers (every config provider in every
puppet-openstack modules) behave correctly.

Change-Id: I4dce9b8a89139f0b37f5c92dd9acf608e16ee6c1
Depends-On: I7c880518f0323e44e7c72f0ff5548482a0b1413c

spec/acceptance/openstacklib_config_provider_spec.rb

@@ -0,0 +1,57 @@
+require 'spec_helper_acceptance'
+
+describe 'basic config provider resource' do
+
+  context 'default parameters' do
+
+    it 'should work with no errors' do
+      pp= <<-EOS
+      Exec { logoutput => 'on_failure' }
+
+      # We create the file manually here because we only want to test
+      # the logic of the provider hence installing the whole stack would
+      # result in some overhead that is already tested in puppet-keystone
+      File <||> -> Keystone_config <||>
+      file { '/etc/keystone' :
+        ensure => directory,
+      }
+      file { '/etc/keystone/keystone.conf' :
+        ensure => file,
+      }
+
+      keystone_config { 'DEFAULT/thisshouldexist' :
+        value => 'foo',
+      }
+
+      keystone_config { 'DEFAULT/thisshouldnotexist' :
+        value => '<SERVICE DEFAULT>',
+      }
+
+      keystone_config { 'DEFAULT/thisshouldexist2' :
+        value             => '<SERVICE DEFAULT>',
+        ensure_absent_val => 'toto',
+      }
+
+      keystone_config { 'DEFAULT/thisshouldnotexist2' :
+        value             => 'toto',
+        ensure_absent_val => 'toto',
+      }
+      EOS
+
+
+      # Run it twice and test for idempotency
+      apply_manifest(pp, :catch_failures => true)
+      apply_manifest(pp, :catch_changes => true)
+    end
+
+    describe file('/etc/keystone/keystone.conf') do
+      it { should exist }
+      it { should contain('thisshouldexist=foo') }
+      it { should contain('thisshouldexist2=<SERVICE DEFAULT>') }
+
+      its(:content) { should_not match /thisshouldnotexist/ }
+    end
+
+
+  end
+end