Fix first_found not finding files in roles (only templates)

lib/ansible/plugins/lookup/first_found.py

@@ -185,14 +185,13 @@ class LookupModule(LookupBase):
             else:
                 if roledir is not None:
                     # check the templates and vars directories too,if they exist
-                    for subdir in ('templates', 'vars'):
+                    for subdir in ('templates', 'vars', 'files'):
                         path = self._loader.path_dwim_relative(roledir, subdir, fn)
                         if os.path.exists(path):
                             return [path]
 
                 # if none of the above were found, just check the
-                # current filename against the basedir (this will already
-                # have ../files from runner, if it's a role task
+                # current filename against the current dir
                 path = self._loader.path_dwim(fn)
                 if os.path.exists(path):
                     return [path]