Add support for non-default CF identity providers

[dbahatSAP]

Hi,

Cloud Foundry Java Client 3.14.0.RELEASE, a new property was introduced for supporting non-default CF identity providers.
The change is in the PasswordGrantTokenProvider, adding a new loginHint property (see cloudfoundry/cf-java-client#924).
We'd like to add support for this in the cloud deployer so that additional spring-cloud frameworks built on top it will also be able to use this feature (such as spring-cloud-dataflow and spring-cloud-skipper).

Thanks,
-David

[sabbyanandan]

Hi, @dbahatSAP. Thank you for bringing this up to our attention. Feel free to start a PR at your convenience; we would love to collaborate to get this added to the deployer and extend it to SCDF/Skipper.