Move other-requirements.txt to bindep.txt

The default filename for documenting binary dependencies has been
changed from "other-requirements.txt" to "bindep.txt" with the release
of bindep 2.1.0. While the previous name is still supported, it will
be deprecated.

Move the file around to follow this change.

Note that this change is self-testing, the OpenStack CI infrastructure
will use a "bindep.txt" file to setup nodes for testing.

For more information about bindep, see also:
http://docs.openstack.org/infra/manual/drivers.html#package-requirements
http://docs.openstack.org/infra/bindep/

As well as this announcement:
http://lists.openstack.org/pipermail/openstack-dev/2016-August/101590.html

Change-Id: I0ac55f437ae7c2a8275dc1f316b8d9e76fb2c3b2
diff --git a/other-requirements.txt b/bindep.txt
similarity index 100%
rename from other-requirements.txt
rename to bindep.txt