Remove hplefthandclient from global-requirements

The need for hplefthandclient in tests was removed in
https://review.openstack.org/#/c/93363/ so now we
can remove it from global-requirements.

Change-Id: I8442d64f8826a88956642ff360a1107a4814a8c1
bump heatclient to latest version

Update to the latest heatclient version, which is needed for heat
to access some recent features such as software-config.

Change-Id: Ie442aed94efe4a3dafe708f603842f6ee3830416
Merge "Remove hplefthandclient from global-requirements"
Merge "bump heatclient to latest version"