Carry over network config

[nightvisi0n]

Fixes #193

I tested this fix in the following way:

docker network create test --subnet=10.13.37.0/24 --gateway=10.13.37.1
docker run -d --name=test --network=test --ip=10.13.37.2 fedora:28 sleep 999999
docker network connect bridge test
docker inspect test > /tmp/before
docker run -it --rm --name=ouroboros --hostname=ouroboros -v /var/run/docker.sock:/var/run/docker.sock ouroboros-local-build --run-once --latest
docker inspect test > /tmp/after
diff -u /tmp/before /tmp/after

--- /tmp/before 2019-02-09 16:22:12.325148378 +0100
+++ /tmp/after  2019-02-09 16:22:47.741186003 +0100
@@ -159,15 +159,15 @@
         },
         "NetworkSettings": {
             "Bridge": "",
-            "SandboxID": "5fa60a839a782dc2bde025aff718bd033c4e26fcb7d535abe9872e786b2abeda",
+            "SandboxID": "5de9f6429a7c569f823fac8a3eacc3b57154adf79698a9d95d2ca2da3007d548",
             "HairpinMode": false,
             "LinkLocalIPv6Address": "",
             "LinkLocalIPv6PrefixLen": 0,
             "Ports": {},
-            "SandboxKey": "/var/run/docker/netns/5fa60a839a78",
+            "SandboxKey": "/var/run/docker/netns/5de9f6429a7c",
             "SecondaryIPAddresses": null,
             "SecondaryIPv6Addresses": null,
-            "EndpointID": "60d5f338e845f81c677966a6add138f73566c7355799937c92443f7108350a90",
+            "EndpointID": "b34e354ceef795d3c12a4e70bca8f4e980edc5cc2dbc1adfbb6fc7c761148a9e",
             "Gateway": "192.168.169.1",
             "GlobalIPv6Address": "fd4c:5f97:84be:b89e:0:242:c0a8:a902",
             "GlobalIPv6PrefixLen": 64,
@@ -177,11 +177,11 @@
             "MacAddress": "02:42:c0:a8:a9:02",
             "Networks": {
                 "bridge": {
-                    "IPAMConfig": {},
+                    "IPAMConfig": null,
                     "Links": null,
-                    "Aliases": [],
+                    "Aliases": null,
                     "NetworkID": "dff833bfdf56f2f3926a61564ea94f09df0afe4a8b157a51188d978be063f9f8",
-                    "EndpointID": "60d5f338e845f81c677966a6add138f73566c7355799937c92443f7108350a90",
+                    "EndpointID": "b34e354ceef795d3c12a4e70bca8f4e980edc5cc2dbc1adfbb6fc7c761148a9e",
                     "Gateway": "192.168.169.1",
                     "IPAddress": "192.168.169.2",
                     "IPPrefixLen": 24,
@@ -197,10 +197,11 @@
                     },
                     "Links": null,
                     "Aliases": [
-                        "5e26769ae4d8"
+                        "5e26769ae4d8",
+                        "2a3f7f510b3d"
                     ],
                     "NetworkID": "717de8744adee3253bb915dff0ba0dd6997351d8bf56ffd3ea81f710161fdbf3",
-                    "EndpointID": "2bcde90fb9157d7619ac237f48e9e138a91a7c9804b45f697c22ebc537871412",
+                    "EndpointID": "6309f6033b096409e7337971f1c068ff79989af343541c9f929fb312917e18d3",
                     "Gateway": "10.13.37.1",
                     "IPAddress": "10.13.37.2",
                     "IPPrefixLen": 24,

[dirtycajunrice]

other than the 3 things above the code looks clean! Ill wait for your replies on these reviews :)

[nightvisi0n]

@dirtycajunrice Thanks for the review, I refactored the code and squashed my commits. Please have a look again 🙂

[dirtycajunrice]

Last thing above then you have my thumbs up. will need one more ok from tk or circa then good to go

[dirtycajunrice]

Wonderful. Youve got my approval. Still need one from TK or Circa. As an FYI, we might migrate this block somewhere else later on as we arent sure if it being in dockerclient is the right final resting place for the logic, but Its a great submission and we appreciate you helping out!

[circa10a]

Appreciate the contribution!
Like @dirtycajunrice said, may find a better place for the logic to reside, but the core functionality looks great!