Fix region name in neutron metadata_agent

This was being set wth a incorrect case causing attempts to access
metadata on the overcloud to fail with
EndpointNotFound: Could not find Service or Region in Service Catalog.

Change-Id: I5cd5d2bb4c884e511c31248b1f7213f4287da905
Fix another remaining use of PIP_INDEX_URL.

Scripts directly embedding a manual pip url break elements like pypi
which offer a local mirror, and that plays havoc with offline builds -
they stay rather more online than desirable :).

Change-Id: I2edf05f0144e11158756125af6afbf63efc5ee95
Merge "Fix another remaining use of PIP_INDEX_URL."
Merge "Fix region name in neutron metadata_agent"