Merge pull request #2434 from arkodg/bump-golang-1.12.8

Bumps the GO Version to 1.12.8 which contains security fixes

libnetwork/Dockerfile

@@ -1,6 +1,6 @@
-ARG GO_VERSION=1.12.6
+ARG GO_VERSION=1.12.8
 
-FROM golang:${GO_VERSION} as dev
+FROM golang:${GO_VERSION}-stretch as dev
 RUN apt-get update && apt-get -y install iptables \
 		protobuf-compiler
 

libnetwork/osl/namespace_linux.go

@@ -681,7 +681,7 @@ func (n *networkNamespace) ApplyOSTweaks(types []SandboxType) {
 	for _, t := range types {
 		switch t {
 		case SandboxTypeLoadBalancer:
-			n.InvokeFunc(func() { kernel.ApplyOSTweaks(loadBalancerConfig) })
+			kernel.ApplyOSTweaks(loadBalancerConfig)
 		}
 	}
 }