Updated configurations to point to openstack-helm-infra
for reference to helm-toolkit as helm-toolkit has been
removed from the openstack-helm repo [0]
Also aligned with changes to the keystone user set up in
OSH using Helm ToolKit so as to get pass Helm Lint.
Updated Makefile targets to install helm dynamically
[0] https://review.openstack.org/#/c/558065/
Change-Id: I0a0813516f9ad176ff005b4693e6b933013a99fd