[Integrated] RFR: notify: add Slack notifier

[Erik Helin]

Changeset: 09ad3dc2
Author:    Erik Helin <ehelin at openjdk.org>
Date:      2020-04-06 14:40:07 +0000
URL:       https://git.openjdk.java.net/skara/commit/09ad3dc2

notify: add Slack notifier

Reviewed-by: rwestberg

! bots/notify/src/main/java/org/openjdk/skara/bots/notify/IssueUpdater.java
! bots/notify/src/main/java/org/openjdk/skara/bots/notify/NotifyBotFactory.java
! bots/notify/src/main/java/org/openjdk/skara/bots/notify/PullRequestUpdateConsumer.java
! bots/notify/src/main/java/org/openjdk/skara/bots/notify/PullRequestWorkItem.java
! bots/notify/src/main/java/org/openjdk/skara/bots/notify/RepositoryUpdateConsumer.java
+ bots/notify/src/main/java/org/openjdk/skara/bots/notify/SlackUpdater.java
! bots/tester/src/test/java/org/openjdk/skara/bots/tester/InMemoryHost.java
! forge/src/main/java/org/openjdk/skara/forge/Forge.java
! forge/src/main/java/org/openjdk/skara/forge/github/GitHubHost.java
! forge/src/main/java/org/openjdk/skara/forge/github/GitHubPullRequest.java
! forge/src/main/java/org/openjdk/skara/forge/gitlab/GitLabForgeFactory.java
! forge/src/main/java/org/openjdk/skara/forge/gitlab/GitLabHost.java
! issuetracker/src/main/java/org/openjdk/skara/issuetracker/Issue.java
! test/src/main/java/org/openjdk/skara/test/TestHost.java