The 'tenant_id' passing to keystoneclient.v3.client.Client is
deprecated, and may be removed in the 2.0.0 release[1]. Replace
it with 'project_id' as suggested.
[1]:
f8c47a1aa0/keystoneclient/v3/client.py (L73)
Change-Id: I2898bb10e4373916b06c90b6b18ceb65845ae3b7
Related-Bug: #1514756