Make parsing methods local

The parsing methods are used only internally; they must not be
exposed to users outside the respective packages.
diff --git a/openstack/orchestration/v1/stacks/environment_test.go b/openstack/orchestration/v1/stacks/environment_test.go
index 5a02d7a..bbef283 100644
--- a/openstack/orchestration/v1/stacks/environment_test.go
+++ b/openstack/orchestration/v1/stacks/environment_test.go
@@ -161,7 +161,7 @@
 
 	err = env.Parse()
 	th.AssertNoErr(t, err)
-	err = env.GetRRFileContents(ignoreIfEnvironment)
+	err = env.getRRFileContents(ignoreIfEnvironment)
 	th.AssertNoErr(t, err)
 	expected_env_files_content := "\nheat_template_version: 2013-05-23\n\ndescription:\n  Heat WordPress template to support F18, using only Heat OpenStack-native\n  resource types, and without the requirement for heat-cfntools in the image.\n  WordPress is web software you can use to create a beautiful website or blog.\n  This template installs a single-instance WordPress deployment using a local\n  MySQL database to store the data.\n\nparameters:\n\n  key_name:\n    type: string\n    description : Name of a KeyPair to enable SSH access to the instance\n\nresources:\n  wordpress_instance:\n    type: OS::Nova::Server\n    properties:\n      image: { get_param: image_id }\n      flavor: { get_param: instance_type }\n      key_name: { get_param: key_name }"
 	expected_db_files_content := "\nheat_template_version: 2014-10-16\n\ndescription:\n  Test template for Trove resource capabilities\n\nparameters:\n  db_pass:\n    type: string\n    hidden: true\n    description: Database access password\n    default: secrete\n\nresources:\n\nservice_db:\n  type: OS::Trove::Instance\n  properties:\n    name: trove_test_db\n    datastore_type: mariadb\n    flavor: 1GB Instance\n    size: 10\n    databases:\n    - name: test_data\n    users:\n    - name: kitchen_sink\n      password: { get_param: db_pass }\n      databases: [ test_data ]"
@@ -169,7 +169,7 @@
 	th.AssertEquals(t, expected_env_files_content, env.Files[fakeEnvURL])
 	th.AssertEquals(t, expected_db_files_content, env.Files[fakeDBURL])
 
-	env.FixFileRefs()
+	env.fixFileRefs()
 	expected_parsed := map[string]interface{}{
 		"resource_registry": "2015-04-30",
 		"My::WP::Server":    fakeEnvURL,