Updated openstack/openstack
Project: openstack/requirements  90846cf3a1fc004290e746aa58840a761a9b5012
null
Remove pam

The pam library was listed in global requirements.

Keystone doesn't require pam anymore, and I don't see any other
projects using it, so remove it.

Change-Id: I2d3c7ef17adf70374e14197ce906800d6ab841ab