Fix all attributes error for custom guidelines

There are several errors during attributes descriptions
checking by custom guidelines. Need to fix them for
successful pep8 running.

implements bp custom-guidelines

Change-Id: I3df75c6343217723fd4490f9e70eb2d8499eb5ae

heat/engine/resources/openstack/heat/resource_group.py

@@ -196,7 +196,7 @@ class ResourceGroup(stack_resource.StackResource):
 
     attributes_schema = {
         REFS: attributes.Schema(
-            _("A list of resource IDs for the resources in the group"),
+            _("A list of resource IDs for the resources in the group."),
             type=attributes.Schema.LIST
         ),
         ATTR_ATTRIBUTES: attributes.Schema(

heat/engine/resources/openstack/heat/software_deployment.py

@@ -180,7 +180,7 @@ class SoftwareDeployment(signal_responder.SignalResponder):
             type=attributes.Schema.STRING
         ),
         STATUS_CODE: attributes.Schema(
-            _("Returned status code from the configuration execution"),
+            _("Returned status code from the configuration execution."),
             type=attributes.Schema.STRING
         ),
     }

heat/engine/resources/openstack/heat/swiftsignal.py

@@ -75,12 +75,12 @@ class SwiftSignalHandle(resource.Resource):
         TOKEN: attributes.Schema(
             _('Tokens are not needed for Swift TempURLs. This attribute is '
               'being kept for compatibility with the '
-              'OS::Heat::WaitConditionHandle resource'),
+              'OS::Heat::WaitConditionHandle resource.'),
             cache_mode=attributes.Schema.CACHE_NONE,
             type=attributes.Schema.STRING
         ),
         ENDPOINT: attributes.Schema(
-            _('Endpoint/url which can be used for signalling handle'),
+            _('Endpoint/url which can be used for signalling handle.'),
             cache_mode=attributes.Schema.CACHE_NONE,
             type=attributes.Schema.STRING
         ),
@@ -90,7 +90,7 @@ class SwiftSignalHandle(resource.Resource):
               'failure. You can signal success by adding '
               '--data-binary \'{"status": "SUCCESS"}\' '
               ', or signal failure by adding '
-              '--data-binary \'{"status": "FAILURE"}\''),
+              '--data-binary \'{"status": "FAILURE"}\'.'),
             cache_mode=attributes.Schema.CACHE_NONE,
             type=attributes.Schema.STRING
         ),

tools/custom_guidelines.py

@@ -58,8 +58,8 @@ class HeatCustomGuidelines(object):
             self._check_resource_schemas(cls, cls.properties_schema,
                                          'property')
             # check attributes' descriptions
-            #self._check_resource_schemas(cls, cls.attributes_schema,
-            #                             'attribute')
+            self._check_resource_schemas(cls, cls.attributes_schema,
+                                         'attribute')
             # check methods descriptions
             #self._check_resource_methods(cls)