KEYCLOAK-2785: Admin client should be able to delete a user.

The delete user service should be exposed in the admin client.

integration/admin-client/src/main/java/org/keycloak/admin/client/resource/UsersResource.java

@@ -19,13 +19,7 @@ package org.keycloak.admin.client.resource;
 
 import org.keycloak.representations.idm.UserRepresentation;
 
-import javax.ws.rs.Consumes;
-import javax.ws.rs.GET;
-import javax.ws.rs.POST;
-import javax.ws.rs.Path;
-import javax.ws.rs.PathParam;
-import javax.ws.rs.Produces;
-import javax.ws.rs.QueryParam;
+import javax.ws.rs.*;
 import javax.ws.rs.core.MediaType;
 import javax.ws.rs.core.Response;
 import java.util.List;
@@ -59,4 +53,7 @@ public interface UsersResource {
     @Path("{id}")
     UserResource get(@PathParam("id") String id);
 
+    @Path("{id}")
+    @DELETE
+    Response delete(@PathParam("id") String id);
 }