Support annotations in environment specs (#733)

* Added annotations to runtime and builder environment specs
* Use crd annotations for env pod

executor/poolmgr/gp.go

@@ -485,10 +485,12 @@ func (gp *GenericPool) createPool() error {
 		gracePeriodSeconds = gp.env.Spec.TerminationGracePeriod
 	}
 
-	podAnnotation := make(map[string]string)
-
+	podAnnotations := gp.env.Metadata.Annotations
+	if podAnnotations == nil {
+		podAnnotations = make(map[string]string)
+	}
 	if gp.useIstio && gp.env.Spec.AllowAccessToExternalNetwork {
-		podAnnotation["sidecar.istio.io/inject"] = "false"
+		podAnnotations["sidecar.istio.io/inject"] = "false"
 	}
 
 	deployment := &v1beta1.Deployment{
@@ -504,7 +506,7 @@ func (gp *GenericPool) createPool() error {
 			Template: apiv1.PodTemplateSpec{
 				ObjectMeta: metav1.ObjectMeta{
 					Labels:      gp.labelsForPool,
-					Annotations: podAnnotation,
+					Annotations: podAnnotations,
 				},
 				Spec: apiv1.PodSpec{
 					Volumes: []apiv1.Volume{