Description of problem:
No installed gnocchiclient on telemetry standalone role when isntalling composable roles with telemetry standalone. Thus can't observe any metrics on telemetry node, need to install the gnocchiclient first.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Install composable roles with Telemetry Standalone composable role: 1 controller, 1 compute, 1 telemetry
2. Log in to telemetry role
3. Using overvloud source, try to get anything from openstack metric
Get error, the command is not known
Get openstack metric info
the client should be on the undercloud, not the telemetry node.