Update to requests>=1.0.0 for keystoneclient.

The requests module dropped all configuration with the 1.0.0 release.
There's no danger_mode and no 'verbose'' mode. The former shouldn't
be necessary anymore and the latter can be done by setting a different
log handler for the request.logging root logger.

Related to https://review.openstack.org/#/c/20127/

Change-Id: Ide43a41b5481daede96e142d1a4f6519e33c21bf
Tenant to Project in Back ends

A continuation of the process to convert the term tenant
to project.  These changes should only be visible in the
error messages produced, but should otherwise be
undetectable by calling programs.

Removes the TenantNotFound exception which propagates changes through
the code that calls the backends as well

Change-Id: I998a44bfd6aa85f67d58904bd7af25a56c73d48a
tenant to project in the apis

Change-Id: I1f6fdf304ca3ff0b6e0e05a71fd944189105c5b6
Merge "Tenant to Project in Back ends"
Merge "Update to requests>=1.0.0 for keystoneclient."
Merge "tenant to project in the apis"