Move Kubernetes Secrets storage update to goroutine

Fixes issue where apiserver outages can block dynamiclistener from accepting new connections.

Signed-off-by: Brad Davidson <brad.davidson@rancher.com>

cert/secret.go

@@ -0,0 +1,16 @@
+package cert
+
+import v1 "k8s.io/api/core/v1"
+
+func IsValidTLSSecret(secret *v1.Secret) bool {
+	if secret == nil {
+		return false
+	}
+	if _, ok := secret.Data[v1.TLSCertKey]; !ok {
+		return false
+	}
+	if _, ok := secret.Data[v1.TLSPrivateKeyKey]; !ok {
+		return false
+	}
+	return true
+}