[Issue] If the AZ cli is configured for non-json output, commands may fail

[Petermarcu]

We should make sure we are explicitly asking for json output on all our az calls. We should run all our tests with the CLI configured with a different default to find other cases like in issue #441

[ellismg]

Let's also consider modifying runAzCommand so that it forces json output (instead of requiring us to pass --output json for each command. For the few cases where we run az and need non json output, runAzCommandWithArgs exists and we can ensure via inspection that --output is passed.

[hemarina]

We decide to remove az cli from our project and apply Go SDK. Go SDK returns JSON responses with automatic JSON unmarshalling. @wbreza is working on that and having some great stuff. Once az cli is removed, we would close this issue.