KEYCLOAK-3142 - Capture ResourceType that triggers an AdminEvent

Introduced new ResourceType enum for AdminEvents which lists
the current supported ResourceTypes for which AdminEvents
can be fired.

Previously it was difficult for custom EventListeners to figure
out which ResourceType triggered an AdminEvent in order
to handle it appropriately, effectively forcing users to parse
the representation.
Having dedicated resource types as a marker on an AdminEvent helps
to ease custom EventListener code.

We now also allow filtering of admin events by ResourceType in the
admin-console.

Signed-off-by: Thomas Darimont <thomas.darimont@gmail.com>

core/src/main/java/org/keycloak/representations/idm/AdminEventRepresentation.java

@@ -18,7 +18,6 @@
 package org.keycloak.representations.idm;
 
 /**
- *
  * @author Stan Silvert ssilvert@redhat.com (C) 2016 Red Hat Inc.
  */
 public class AdminEventRepresentation {
@@ -27,6 +26,7 @@ public class AdminEventRepresentation {
     private String realmId;
     private AuthDetailsRepresentation authDetails;
     private String operationType;
+    private String resourceType;
     private String resourcePath;
     private String representation;
     private String error;
@@ -63,6 +63,14 @@ public class AdminEventRepresentation {
         this.operationType = operationType;
     }
 
+    public String getResourceType() {
+        return resourceType;
+    }
+
+    public void setResourceType(String resourceType) {
+        this.resourceType = resourceType;
+    }
+
     public String getResourcePath() {
         return resourcePath;
     }
@@ -86,5 +94,4 @@ public class AdminEventRepresentation {
     public void setError(String error) {
         this.error = error;
     }
-
 }