Remove json tag in NetworkConnect.EndpointConfig
Remove json tag in NetworkConnect.EndpointConfig

- Not necessary and docker follows camel case convention for json variables

Signed-off-by: Alessandro Boch <5bd2eb5b6f60921d9a2b9cb6a0a86bb947f3d361@docker.com>

mikedougherty/engine-api,docker/engine-api,msabansal/engine-api,rhatdan/engine-api,vdemeester/engine-api,jwhonce/engine-api,thaJeztah/engine-api