Fix usage of tenant_id in tests

Some tests assume that the base test classes
set a tenant_id parameter at the class level.
This is not the case because base test classes
most often are capable of dealing with multiple
tenants via tempest's test credential framework.

Change-Id: If9b57f0f78c43d5f17738f13cc86b0594d3d2994
Signed-off-by: Goutham Pacha Ravi <gouthampravi@gmail.com>
2 files changed