去除对redis key过期事件的使用；重构国标级联的注册保活

src/main/java/com/genersoft/iot/vmp/gb28181/utils/HeaderUtils.java

@@ -0,0 +1,22 @@
+package com.genersoft.iot.vmp.gb28181.utils;
+
+import javax.sip.PeerUnavailableException;
+import javax.sip.SipFactory;
+import javax.sip.header.UserAgentHeader;
+import java.text.ParseException;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * 生成header的工具类
+ * @author lin
+ */
+public class HeaderUtils {
+
+    public static UserAgentHeader createUserAgentHeader(SipFactory sipFactory) throws PeerUnavailableException, ParseException {
+        List<String> agentParam = new ArrayList<>();
+        agentParam.add("WVP PRO");
+        // TODO 添加版本信息以及日期
+        return sipFactory.createHeaderFactory().createUserAgentHeader(agentParam);
+    }
+}