Fixes the azure auth for postgresql

[aaomidi]

Attempts to fix the postgresql issue with authentication.

[coveralls]

Coverage decreased (-0.1%) to 34.813% when pulling a98fd1b on amir/postgres/fixAuth into 534eb3a on master.

[Charles-Gagnon]

@aaomidi Anything blocking this going in?

[aaomidi]

@Charles-Gagnon I haven't confirmed this fixes their problem. I am waiting for a signoff from the postgre team.

[swjain23]

@aaomidi - Richard has verified that the PR solves the issue. Just for future reference, if we find a problem with Release, what is the process? do we comment on the release issue or send an email?

[aaomidi]

Opening an issue and linking to it in an email is great! I'll make a port request this for release now, please make sure to test the release RCs on #10720

I'll link to the port request PR here as well

[aaomidi]

#10753

[swjain23]

Got it, thank you :). We will test it once it is merged to release branch.

[rich617]

I still think we need a connection property that returns true if authType is either AzureMFA or AzureMFAAndUser because that test is in a lot of places. If no one has time, maybe I'll give it a go.