This commit adds "external" part in redis configuration in helm chart, by this way users can use the existing external Redis rather than using the internal one
Update the helm chart of Harbor to use 1.5 image. Specifically
`1.5.0-chart-patch` to include the fix to #4496 (for integration reason
this fix will not be merge to release branch).
Verified against kubenetes v1.10.0
* Update Harbor helm chart to deploy Harbor 1.4.0 release
* Change version to 0.1.0 and fix a doc error
* Fix auth_mode default value
* Refine doc and fix a typo