Update OSL for 1.6.1 and bump up version (goharbor#6041)

* Update OSL for 1.6.1 and bump up version

Signed-off-by: Daniel Jiang <jiangd@vmware.com>

* Update the URL for installing golint in travis.yml

Signed-off-by: Daniel Jiang <jiangd@vmware.com>

Update LICENSE and OSL (goharbor#5874)

Signed-off-by: Daniel Jiang <jiangd@vmware.com>

Merge pull request goharbor#5846 from steven-zou/fix_async_issue_of_c…

…hart_api

Fix the potential issue of causing deadlock problem

Merge pull request goharbor#5805 from wy65701436/release-1.6.0

[Cherry-pick]Add the encoding to the data converter script

Temporarily disable updaters of clair (goharbor#5708)

Set the updater interval to "0" to mitigate the impact of Apline URL
change that cause clair keep polling vuln data.

Signed-off-by: Daniel Jiang <jiangd@vmware.com>

Merge pull request goharbor#5624 from steven-zou/append_index_2_user_…

…guide_1.6.0

[Cherry-pick] Append chart repo service related sections to the agenda of user guide doc

Merge pull request goharbor#5333 from reasonerjt/release-1.5.0

Update Makefile and OSL

Merge pull request goharbor#5333 from reasonerjt/release-1.5.0

Update Makefile and OSL

Merge pull request goharbor#5004 from ywk253100/180521_log

Log error message in server side

Merge pull request goharbor#4905 from reasonerjt/fix-uaa-admin-1.4

Sync user info after UAA user is logged in - cherrypick to 1.4 branch