[Feature Request] Reenable failing integration tests

[AndyOHart]

Is your feature request related to a problem? Please describe.
No, we disabled 2 integration tests to fix at a later date, this is just a tracker for this

Describe the solution you'd like
Reenable TestOnBehalfOf and TestConfidentialClientwithSecret in integration_test.go and get them working

Describe alternatives you've considered
No alternatives needed, just need to modify the code so that the tests work

Additional context
NA