Prevent duplicate service registration in microservice application

packages/microservice/src/Microservice.ts

@@ -160,6 +160,9 @@ export class Microservice
 	 */
 	public installService<T extends Microservice>(this: T, InternalServiceClass: InternalServiceConstructor<T>) {
 		let InternalService = new InternalServiceClass(this);
+		if (InternalService.NAME in this.services) {
+			throw new Error("Install Service Error: Attempted to register multiple services with the same name");
+		}
 		this.services[InternalService.NAME] = InternalService;
 	}