RFR: 2004: Field 'groups' in Class GitLabHost should be 'List' [v2]

[Zhao Song]

> Currently, the type of field 'groups' in GitLabHost is a set. However, we would like the bot has some preference for some groups, so this field should be able to keep the order. 
> 
> The solution is to change the type this field to List.

Zhao Song has updated the pull request incrementally with one additional commit since the last revision:

  update

-------------

Changes:
  - all: https://git.openjdk.org/skara/pull/1550/files
  - new: https://git.openjdk.org/skara/pull/1550/files/c6a06814..be3181d5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=skara&pr=1550&range=01
 - incr: https://webrevs.openjdk.org/?repo=skara&pr=1550&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/skara/pull/1550.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1550/head:pull/1550

PR: https://git.openjdk.org/skara/pull/1550