Fix error in collection templates.

Removed unicode strings from some recently added has_privilege calls.
Appears this is not valid syntax as it would be in the python code
itself. Causes an error showing the template:

Error - <class 'jinja2.exceptions.TemplateSyntaxError?'>: expected token
',', got 'string'

mediagoblin/templates/mediagoblin/user_pages/collection.html

@@ -45,7 +45,7 @@
     {%- endtrans %}
   </h1>
   {% if request.user and (collection.creator == request.user.id or
-                                                request.user.has_privilege(u'admin')) %}
+                                                request.user.ghas_privilege('admin')) %}
     {% set edit_url = request.urlgen('mediagoblin.edit.edit_collection',
                                      user=collection.get_creator.username,
                                      collection=collection.slug) %}

mediagoblin/templates/mediagoblin/utils/collection_gallery.html

@@ -39,7 +39,7 @@
             {% endif %}
 	    {% if request.user and
                   (item.in_collection.creator == request.user.id or
-                  request.user.has_privilege(u'admin')) %}
+                  request.user.has_privilege('admin')) %}
 	      {%- set remove_url=request.urlgen(
                                  'mediagoblin.user_pages.collection_item_confirm_remove',
                                  user=item.in_collection.get_creator.username,