Merge pull request #6 from making/fix-wrong-url-class

spring-boot-admin-server/src/main/java/de/codecentric/boot/admin/service/ApplicationRegistry.java

@@ -16,13 +16,13 @@
 package de.codecentric.boot.admin.service;
 
 import java.net.MalformedURLException;
+import java.net.URL;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
 import org.apache.commons.lang3.Validate;
-import org.apache.tomcat.util.net.URL;
 import org.springframework.stereotype.Service;
 
 import de.codecentric.boot.admin.model.Application;