[GSS] (7.2.z) Provide Elytron alternative to RoleMappingLoginModule

In picketbox there is RoleMappingLoginModule [1], which takes role as returned from authorization process and maps to different role. I thought something similar should be configurable with some of Elytron role-mappers. But looking into model/code, it is not obvious to me which of them can be used. I know custom role mapper can be still used, but I wonder if we really do not provide this common funcionality out of the box with Elytron.

Another workaround is to use direct roles from realm (e.g. LDAP ) in target (e.g. web.xml). But seems users tend to map IDM Roles to applicaiton roles.

[1] https://access.redhat.com/documentation/en-us/red_hat_jboss_enterprise_application_platform/7.1/html-single/login_module_reference/#rolemapping_login_module