Updated openstack/openstack
Project: openstack/python-openstackclient  e06e1a2cce0dbe9f7fd7e64467af73e7456a2aa5
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Add missing requests and six requirements

From global-requirements: requests>=1.1, six>=1.4.1

Change-Id: I536adc511931229a268ba81f81aef1aed59b33eb