[Enhancement] Add support for extraQueryParameters

[navyasric]

Spec:

• new API at request level (on all AcquireToken* methods) should allow passing in a map of key / value string pairs
• in public client, the authorization url which is used to open the browser, must use append these parameters
• in confidential client, the GetAuthorizationUrl API should take into account these parameters
• in both clients, the token endpoint must append these parameters (even though the request is a POST request)
• when talking to broker, the parameters must be added the Properties bag of auth parameters
• in case of conflict, (e.g. app developer tries to pass in scope=foo and call AcquireTokenInteractive), throw exception

Needed for a number of functionalities to be enabled. E.g.:
Customers needs support of extra query parameters in order to use ROPC flow with B2C

[henrik-me]

Similar to: #255

[bgavrilMS]

This will be needed for full WAM support.

[bgavrilMS]

@siddhijain - is this done? Can this be closed?

[siddhijain]

This will be closed once we update the broker PR with
'when talking to a broker, the parameters must be added to the Properties bag of auth parameters'. Avery is planning to update. Tagging him to close this once done. @Avery-Dunn

[Avery-Dunn]

Support for extraQueryParameters in the broker package was add as part of #639, so this is fully supported.