Added support for replicas keys in v3

resolves #644 `replicas` key

pkg/transformer/openshift/openshift.go

@@ -346,7 +346,13 @@ func (o *OpenShift) Transform(komposeObject kobject.KomposeObject, opt kobject.C
 	for _, name := range sortedKeys {
 		service := komposeObject.ServiceConfigs[name]
 		var objects []runtime.Object
-
+		//replicas
+		var replica int
+		if opt.IsReplicaSetFlag || service.Replicas == 0 {
+			replica = opt.Replicas
+		} else {
+			replica = service.Replicas
+		}
 		// Must build the images before conversion (got to add service.Image in case 'image' key isn't provided
 		// Check to see if there is an InputFile (required!) before we build the container
 		// Check that there's actually a Build key
@@ -394,7 +400,7 @@ func (o *OpenShift) Transform(komposeObject kobject.KomposeObject, opt kobject.C
 			objects = o.CreateKubernetesObjects(name, service, opt)
 
 			if opt.CreateDeploymentConfig {
-				objects = append(objects, o.initDeploymentConfig(name, service, opt.Replicas)) // OpenShift DeploymentConfigs
+				objects = append(objects, o.initDeploymentConfig(name, service, replica)) // OpenShift DeploymentConfigs
 				// create ImageStream after deployment (creating IS will trigger new deployment)
 				objects = append(objects, o.initImageStream(name, service, opt))
 			}