User guide on how to use harbor preview server.

Add LDAP search UI

1. Add group management
2. Add rewrite import user to member ui
3. Add import group to member
4. Add new items in configuration page

Update the swagger file

This commit fixes #5072
Due to an issue in bzr, Clair container may consume a lot of CPU
resource while updating the vuln data.  This commit mitigates the impact
by setting the cpu_quota of clair container. (default value of
cpu_period is 100000 in v2 docker-compose template)

Define the related handlers to handler the requests of chart server/repo

Update migrator 1 6 0

1. Add new alembic_pg folder for postgres
2. Add migration file for 1.6.0
3. Update version to 1.6.0
4. update migrator dockerfile

add chartserver directory to put chart server code
add controller to coordinate the flow
add base/repo/manipulation handlers to handle requests
add operator to parse more details of chart version
call dep ensure

Add rewrite-target annotation to ingress rule

Fix bug in search API

Label filter UI for replication

SERVER_ID should be SERVER_IP

Fix #5168 by correcting the types of properties used in ProjectMetadata

The annotation prefix changes in a specific version of nginx controller, add the two kinds of annotation for rewrite-target to the rule to make it works.

Add data verify e2e case after upgrade

Helm: Do not mount secret if ingress is disabled

Fix issue that harbor tile can not save customized settings 

Update docs

Add upgrade test tips

Add upgrade test data generate script and example data

Replace the email address with image to avoid junk emails

Update partners.md

New architecture diagram

Uploading new architecture diagram for documentation

Tweak content of page, including some grammatical errors. Removed reference to beego.

Initialise Harbor DB schema in Harbor UI/adminserver container

Add tips and information before and after upgrade for Harbor
upgrade test

This commit fixes #5040, the harbor-db image will only contain empty
databases, and harbor ui container will use migrate tool to run initial
SQL scripts to do initialization.  This is helpful for the case to
configure Harbor against external DB or DBaaS like RDS for HA deployment
However, this change will results some confusion as there are two tables
to track schema versions have been using alembic for migration, for this
release we'll try to use alembic to mock a `migration` table during
upgrade so the migrator will be bypassed, in future we'll consider to
consolidate to the golang based migrator.
Another issue is that the UI and adminserver containers will access DB
after start up in different congurations, can't ensure the sequence, so
both of them will try to update the schema when started up.

Refactor the logic of search API to fix bug mentioned in issue #5156 and #3838

Update create project keyword to avoid created project on the second page caused verify fail

Updated registry_landscape.md

Helm: Options to disable ingress objects

Enable CA cert download on Chart deployment

Update ingress rule for Harbor chart

Simplified and tweaked registry landscape table.

This commit fixes #5138.  A volume references the secret will be mounted
to the UI pod, so the user can download the CA cert from UI.