Update Skydive Analyzer's configuration to use Keystone as its backend
for authenticating users. Any user with a role in the project defined
by the variable skydive_admin_tenant_name will be able to access
Skydive.
Change-Id: I64c811d5eb72c7406fd52b649fa00edaf2d0c07b
Closes-Bug: 1870903
(cherry picked from commit 7e5aa637283b32eaceaf0495794626a1fdeecd82)
31f09efd16