Add HostAliases to schema (#656)

Add HostAliases to schema and propagate them to pods so the user can add entries to /etc/hosts

api/v1alpha2/jenkins_types.go

@@ -372,6 +372,10 @@ type JenkinsMaster struct {
 	// PriorityClassName for Jenkins master pod
 	// +optional
 	PriorityClassName string `json:"priorityClassName,omitempty"`
+
+	// HostAliases for Jenkins master pod and SeedJob agent
+	// +optional
+	HostAliases []corev1.HostAlias `json:"hostAliases,omitempty"`
 }
 
 // Service defines Kubernetes service attributes