We should override the 'auth_type' to 'none' when using the old way of
setting up authentication with 'auth_strategy' so we can override the
default 'auth_type' value before getting the session information.
This fixes the following issue
Unhandled error: MissingRequiredOptions: Auth plugin requires parameters which were not given: auth_url
This also adds a new testcase to test the strategy='noauth' scenario.
Closes-Bug: #1748263
Change-Id: I875e2b17f5c6829ad81f86c32959cb106bf57e53