OO-267 search for OLAT provider before activating controller to support LDAP/OLAT setup

src/main/java/org/olat/login/LoginAuthprovidersController.java

@@ -146,6 +146,16 @@ public class LoginAuthprovidersController extends MainLayoutBasicController impl
 		} else if ("about".equals(type)) {
 			showAboutPage(ureq);
 			olatMenuTree.setSelectedNodeId(aboutNode.getIdent());
+		} else if ("registration".equals(type)) {
+			// make sure the OLAT authentication controller is activated as only this one can handle registration requests
+			AuthenticationProvider OLATProvider = LoginModule.getAuthenticationProvider(BaseSecurityModule.getDefaultAuthProviderIdentifier());
+			if (OLATProvider.isEnabled()) {
+				initLoginContent(ureq, BaseSecurityModule.getDefaultAuthProviderIdentifier());
+				if(authController instanceof Activateable2) {
+					((Activateable2)authController).activate(ureq, entries, state);
+				}
+			}			
+			// don't know what to do when the OLAT provider is not enabled
 		} else if(authController instanceof Activateable2) {
 			((Activateable2)authController).activate(ureq, entries, state);
 		}