添加对海康平台录像回放的兼容，修复录像信息发送失败, 级联平台支持开启rtcp保活

648540858

2022-09-05 d5e8aa62a11352f228ba449b204d53d4e17897a5

 src/main/java/com/genersoft/iot/vmp/gb28181/transmit/event/request/impl/InviteRequestProcessor.java

@@ -563,6 +563,7 @@
            responseAck(evt, Response.BAD_REQUEST, "channel [" + gbStream.getGbId() + "] offline");
        } else if ("push".equals(gbStream.getStreamType())) {
            if (!platform.isStartOfflinePush()) {
                // 平台设置中关闭了拉起离线的推流则直接回复
                responseAck(evt, Response.TEMPORARILY_UNAVAILABLE, "channel unavailable");
                return;
            }
@@ -599,7 +600,7 @@
                            app, stream, channelId, mediaTransmissionTCP);

                    if (sendRtpItem == null) {
                        logger.warn("服务器端口资源不足");
                        logger.warn("上级点时创建sendRTPItem失败，可能是服务器端口资源不足");
                        try {
                            responseAck(evt, Response.BUSY_HERE);
                        } catch (SipException e) {