Support MappedAttributes for IdentityDomains

[F21]

I would like to see methods for IdentityDomains' MappedAttributes implemented in the SDK.
API reference: https://docs.oracle.com/en/cloud/paas/iam-domains-rest-api/api-apps-mapped-attributes.html

MappedAttributes are used to configure user and group mappings for jit provisioning of users when using an identity provider. Having this in the SDK would allow them to be implemented in the terraform provider, which will allow us to automate the creation of identity providers in identity domains.

[jyotisaini]

This API has to be exposed by the Identity domains service for the SDKs to be able to support it.

[F21]

@jyotisaini I believe the APIs are already availble. See: https://docs.oracle.com/en/cloud/paas/iam-domains-rest-api/api-apps-mapped-attributes.html

[jyotisaini]

The APIs are there but are not exposed as part of SDK generation. These have to be part of the Spec file for SDKs to have it. I have added Identity team to take a look in to it.