Juan J. Martinez bb3bfe1dbd Consistent timestamp formatting for last_modified.
Fixes bug 798268.

Python datetime's isoformat() uses %Y-%m-%dT%H:%M:%S.%f format, but
the miliseconds part is not included when it's zero.

As consequence the compliant ISO 8601 format was not consistent
when performing a GET request over a container (listing objects info).

Change-Id: Ifed3f0adf3eaca47304c142615169bd3f1901631
2012-02-02 11:54:15 +00:00
..
2010-07-12 17:03:45 -05:00