Ignore pylint error 7610 (translation-of-non-string) on where it is intended to do

As some i18n features need ```ugettext``` or its shorcut ```_``` to be called on a non-string-literal, so the pylint check of ```translation-of-non-string``` should be explicitly disabled in such situations.

cms/djangoapps/contentstore/views/checklist.py

@@ -132,12 +132,12 @@ def localize_checklist_text(checklist):
     The method does an in-place operation so the input checklist is modified directly.
     """
     # Localize checklist name
-    checklist['short_description'] = ugettext(checklist['short_description'])
+    checklist['short_description'] = ugettext(checklist['short_description'])    # pylint: disable=translation-of-non-string
 
     # Localize checklist items
     for item in checklist.get('items'):
-        item['short_description'] = ugettext(item['short_description'])
-        item['long_description'] = ugettext(item['long_description'])
-        item['action_text'] = ugettext(item['action_text'])
+        item['short_description'] = ugettext(item['short_description'])    # pylint: disable=translation-of-non-string
+        item['long_description'] = ugettext(item['long_description'])      # pylint: disable=translation-of-non-string
+        item['action_text'] = ugettext(item['action_text'])                # pylint: disable=translation-of-non-string
 
     return checklist

cms/djangoapps/contentstore/views/component.py

@@ -275,7 +275,7 @@ def get_component_templates(courselike, library=False):
                 if not filter_templates or filter_templates(template, courselike):
                     templates_for_category.append(
                         create_template_dict(
-                            _(template['metadata'].get('display_name')),
+                            _(template['metadata'].get('display_name')),    # pylint: disable=translation-of-non-string
                             category,
                             template.get('template_id'),
                             template['metadata'].get('markdown') is not None

cms/djangoapps/contentstore/views/videos.py

@@ -73,7 +73,7 @@ class StatusDisplayStrings(object):
     @staticmethod
     def get(val_status):
         """Map a VAL status string to a localized display string"""
-        return _(StatusDisplayStrings._STATUS_MAP.get(val_status, StatusDisplayStrings._UNKNOWN))
+        return _(StatusDisplayStrings._STATUS_MAP.get(val_status, StatusDisplayStrings._UNKNOWN))    # pylint: disable=translation-of-non-string
 
 
 @expect_json

cms/djangoapps/models/settings/course_metadata.py

@@ -96,8 +96,8 @@ class CourseMetadata(object):
                 continue
             result[field.name] = {
                 'value': field.read_json(descriptor),
-                'display_name': _(field.display_name),
-                'help': _(field.help),
+                'display_name': _(field.display_name),    # pylint: disable=translation-of-non-string
+                'help': _(field.help),                    # pylint: disable=translation-of-non-string
                 'deprecated': field.runtime_options.get('deprecated', False)
             }
         return result