openrc: Stop setting OS_TENANT_NAME

All clients - OSC included - use keystoneauth under the hood which
hasn't required this in a very long time. Stop setting it and remove the
warning.

We also remove references to 'NOVA_*' variables that haven't been a
thing since well before *I* started working on OpenStack 😅

Change-Id: I882081040215d8e32932ec5d03be34e467e4fbc2
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>
1 file changed