Fix golint failures

* Fix golint fails based on the original work from  the user u5surf

* Skip installing Docker as CDP now have one pre-installed (repairs builds on CDP)

pkg/cluster/pod.go

@@ -77,11 +77,7 @@ func (c *Cluster) deletePod(podName spec.NamespacedName) error {
 		return err
 	}
 
-	if err := c.waitForPodDeletion(ch); err != nil {
-		return err
-	}
-
-	return nil
+	return c.waitForPodDeletion(ch)
 }
 
 func (c *Cluster) unregisterPodSubscriber(podName spec.NamespacedName) {

pkg/cluster/types.go

@@ -1,12 +1,13 @@
 package cluster
 
 import (
+	"time"
+
 	acidv1 "github.com/zalando-incubator/postgres-operator/pkg/apis/acid.zalan.do/v1"
 	"k8s.io/api/apps/v1beta1"
 	"k8s.io/api/core/v1"
 	policybeta1 "k8s.io/api/policy/v1beta1"
 	"k8s.io/apimachinery/pkg/types"
-	"time"
 )
 
 // PostgresRole describes role of the node
@@ -20,6 +21,7 @@ const (
 	Replica PostgresRole = "replica"
 )
 
+// PodEventType represents the type of a pod-related event
 type PodEventType string
 
 // Possible values for the EventType

pkg/cluster/util.go

@@ -460,6 +460,7 @@ func (c *Cluster) setSpec(newSpec *acidv1.Postgresql) {
 	c.specMu.Unlock()
 }
 
+// GetSpec returns a copy of the operator-side spec of a Postgres cluster in a thread-safe manner
 func (c *Cluster) GetSpec() (*acidv1.Postgresql, error) {
 	c.specMu.RLock()
 	defer c.specMu.RUnlock()