Fix Py2.6 dict comprehension SyntaxError.

This should fix following:
  File "tempest/tests/object_storage/test_container_sync.py", line 106
    object_list_0 = {obj['name']: obj for obj in object_list_0}
                                        ^
SyntaxError: invalid syntax

Change-Id: I1feb9067bedd0f6ebd497422d3258fdc9b8d3fee
Merge "Fix Py2.6 dict comprehension SyntaxError."