修正TUN模式下的TFE-ENV文件，增加network-online的启动依赖项。

script/service/tfe-env-tun-mode.service

@@ -2,6 +2,8 @@
 Description=Tango Frontend Engine - Running Environment Setup
 Requires=tfe-env.service
 Before=tfe-env.service
+After=network-online.target
+Wants=network-online.target
 
 [Service]
 EnvironmentFile=/etc/sysconfig/tfe-env-config
@@ -14,7 +16,7 @@ ExecStop=/bin/true
 
 # start
 ExecStartPost=/usr/sbin/ifconfig ${TFE_WATCHDOG_DEVICE} ${TFE_WATCHDOG_IP}
-ExecStartPost=/usr/sbin/ip tuntap add dev ${TFE_DEVICE_DATA_INCOMING} mode tap 
+ExecStartPost=/usr/sbin/ip tuntap add dev ${TFE_DEVICE_DATA_INCOMING} mode tap
 ExecStartPost=/usr/sbin/ifconfig ${TFE_DEVICE_DATA_INCOMING} up
 
 # stop

script/service/tfe-env.service

@@ -2,6 +2,7 @@
 Description=Tango Frontend Engine - Running Environment Setup
 Before=tsgkni.service
 Wants=network-online.target
+After=network-online.target
 
 [Service]
 EnvironmentFile=/etc/sysconfig/tfe-env-config

script/service/tfe.service

@@ -3,6 +3,7 @@ Description=Tango Frontend Engine
 Requires=tfe-env.service
 After=tfe-env.service
 
+
 [Service]
 Type=notify
 ExecStart=/opt/tsg/tfe/bin/tfe