增加对水星IPC的兼容

增加对SIP错误的订阅，刷新通道或点播或回放出现sip错误时及时返回给页面
优化UI，增加按钮loading

src/main/java/com/genersoft/iot/vmp/gb28181/event/SipSubscribe.java

@@ -0,0 +1,37 @@
+package com.genersoft.iot.vmp.gb28181.event;
+
+import com.alibaba.fastjson.JSONObject;
+import com.genersoft.iot.vmp.media.zlm.ZLMHttpHookSubscribe;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+
+import javax.sip.ResponseEvent;
+import javax.sip.message.Request;
+import java.util.EventObject;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+@Component
+public class SipSubscribe {
+
+    private final static Logger logger = LoggerFactory.getLogger(SipSubscribe.class);
+
+    private Map<String, SipSubscribe.Event> allSubscribes = new ConcurrentHashMap<>();
+
+    public interface Event {
+        void response(ResponseEvent event);
+    }
+
+    public void addSubscribe(String key, SipSubscribe.Event event) {
+        allSubscribes.put(key, event);
+    }
+
+    public SipSubscribe.Event getSubscribe(String key) {
+        return allSubscribes.get(key);
+    }
+
+    public int getSize(){
+        return allSubscribes.size();
+    }
+}