Update oslo-incubator to 32e7f0b56f52742754

Pickup a couple of changes (mainly the first one listed below)
that are useful to have before we release and will ensure
we are compatible with python 2.6 and RHEL due to a bug
in jsonutils.

d9060f69d203 - Check for namedtuple_as_object support before using it
66142c3471fe - Make strutils.mask_password more secure

Closes-Bug: #1361230

Change-Id: I2c3d86184830211b3163988a4054fc45e233c9ba
Merge "Update oslo-incubator to 32e7f0b56f52742754"