[Integrated] RFR: 166: Add `/solves` command

[Robin Westberg]

Changeset: a77b854b
Author:    Robin Westberg <rwestberg at openjdk.org>
Date:      2019-11-22 13:52:53 +0000
URL:       https://git.openjdk.java.net/skara/commit/a77b854b

166: Add `/solves` command

Reviewed-by: ehelin

! bots/pr/src/main/java/org/openjdk/skara/bots/pr/CheckRun.java
! bots/pr/src/main/java/org/openjdk/skara/bots/pr/CommandWorkItem.java
! bots/pr/src/main/java/org/openjdk/skara/bots/pr/PullRequestInstance.java
+ bots/pr/src/main/java/org/openjdk/skara/bots/pr/SolvesCommand.java
+ bots/pr/src/main/java/org/openjdk/skara/bots/pr/SolvesTracker.java
+ bots/pr/src/test/java/org/openjdk/skara/bots/pr/SolvesTests.java
! bots/pr/src/test/java/org/openjdk/skara/bots/pr/SummaryTests.java