Fix failing to start edgeHub

[annadhpi]

<6>2019-11-09T20:57:59Z [INFO] - Starting module edgeAgent...
<6>2019-11-09T20:58:00Z [INFO] - Successfully started module edgeAgent
<6>2019-11-09T20:58:07Z [INFO] - Querying system info...
<6>2019-11-09T20:58:07Z [INFO] - Successfully queried system info
<6>2019-11-09T20:58:07Z [INFO] - [mgmt] - - - [2019-11-09 20:58:07.696072015 UTC] "GET /systeminfo?api-version=2019-01-30 HTTP/1.1" 200 OK 103 "-" "-" auth_id(-)
<6>2019-11-09T20:58:08Z [INFO] - [work] - - - [2019-11-09 20:58:08.222835384 UTC] "POST /modules/%24edgeAgent/genid/637063619569992917/decrypt?api-version=2019-01-30 HTTP/1.1" 200 OK 1568 "-" "-" auth_id(-)
<6>2019-11-09T20:58:09Z [INFO] - [mgmt] - - - [2019-11-09 20:58:09.037108935 UTC] "GET /modules?api-version=2019-01-30 HTTP/1.1" 200 OK 1578 "-" "-" auth_id(-)
<6>2019-11-09T20:58:14Z [INFO] - [work] - - - [2019-11-09 20:58:14.173616093 UTC] "POST /modules/%24edgeAgent/genid/637063619569992917/decrypt?api-version=2019-01-30 HTTP/1.1" 200 OK 1568 "-" "-" auth_id(-)
<6>2019-11-09T20:58:15Z [INFO] - Stopping module edgeHub...
<4>2019-11-09T20:58:15Z [WARN] - Could not stop module edgeHub
<4>2019-11-09T20:58:15Z [WARN] - caused by: Target of operation already in this state
<6>2019-11-09T20:58:15Z [INFO] - [mgmt] - - - [2019-11-09 20:58:15.219210891 UTC] "POST /modules/edgeHub/stop?api-version=2019-01-30 HTTP/1.1" 304 Not Modified 0 "-" "-" auth_id(-)
<6>2019-11-09T20:58:15Z [INFO] - Starting module edgeHub...
<4>2019-11-09T20:58:15Z [WARN] - Could not start module edgeHub
<4>2019-11-09T20:58:15Z [WARN] - caused by: driver failed programming external connectivity on endpoint edgeHub (ccbc3f9011cfb3fc1bceaf542cfeb6d1332ce03c66fa4f06e0186aefc2048254): (iptables failed: iptables --wait -t nat -A DOCKER -p tcp -d 0/0 --dport 8883 -j DNAT --to-destination 172.18.0.2:8883 ! -i br-4bfc302cd0d7: iptables: No chain/target/match by that name.
(exit status 1))

[annadhpi]

bug filed to iotedge

edgeHub fail to start #2051
Azure/iotedge#2051