keycloak 9.0.0 compilation error

[cmanifold]

When trying to compile branch 9.0.0 using maven on Centos7 got
error messages:
keycloak-protocol-cas/src/main/java/org/keycloak/protocol/cas/endpoints/AuthorizationEndpoint.java:[67,89] incompatible types: org.keycloak.models.KeycloakUriInfo cannot be converted to org.keycloak.models.KeycloakSession
keycloak-protocol-cas/src/main/java/org/keycloak/protocol/cas/endpoints/AuthorizationEndpoint.java:[79,82] incompatible types: org.keycloak.models.KeycloakUriInfo cannot be converted to org.keycloak.models.KeycloakSession
keycloak-protocol-cas/src/main/java/org/keycloak/protocol/cas/representations/SamlResponseHelper.java:[77,59] cannot find symbol
symbol: variable AUTH_METHOD_PASSWORD
....

Apache Maven 3.0.5 (Red Hat 3.0.5-17)
Java version: 1.8.0_252

[phy25]

See #39

[thomasdarimont]

I didn't see this so I created #47 :)