versions: Update golang to 1.10.4

Move to golang version 1.10.4 -- the oldest stable golang release at the
time of writing -- since golang 1.10+ is needed to make namespace
handling safe.

Re-ordered a couple of structs (moved `sync.WaitGroup` fields) to keep
the `maligned` linter happy. Previously:

``
virtcontainers/pkg/mock/cc_proxy_mock.go:24:18:warning: struct of size 160 could be 152 (maligned)
virtcontainers/monitor.go:15:14:warning: struct of size 80 could be 72 (maligned)
```

See:

- golang/go#20676
- golang/go@2595fe7

Also bumped `languages.golang.meta.newest-version` to golang version
1.11, which is the newest stable release at the time of writing.

Fixes #148.

Signed-off-by: James O. D. Hunt <james.o.hunt@intel.com>

versions.yaml

@@ -186,9 +186,10 @@ languages:
   golang:
     description: "Google's 'go' language"
     notes: "'version' is the default minimum version used by this project."
-    version: "1.9.7"
+    issue: "https://github.com/golang/go/issues/20676"
+    version: "1.10.4"
     meta:
-      newest-version: "1.10"
+      newest-version: "1.11"
 
 specs:
   description: "Details of important specifications"

virtcontainers/monitor.go

@@ -18,9 +18,9 @@ type monitor struct {
 	sandbox       *Sandbox
 	checkInterval time.Duration
 	watchers      []chan error
+	wg            sync.WaitGroup
 	running       bool
 	stopCh        chan bool
-	wg            sync.WaitGroup
 }
 
 func newMonitor(s *Sandbox) *monitor {

virtcontainers/pkg/mock/cc_proxy_mock.go

@@ -25,7 +25,6 @@ type CCProxyMock struct {
 	sync.Mutex
 
 	t              *testing.T
-	wg             sync.WaitGroup
 	connectionPath string
 
 	// proxy socket
@@ -44,6 +43,8 @@ type CCProxyMock struct {
 	ShimDisconnected chan bool
 	StdinReceived    chan bool
 
+	wg sync.WaitGroup
+
 	stopped bool
 }