RFR: Add ReadOnlyRepository::contains

[Robin Westberg via github.com]

On Wed, 28 Aug 2019 17:24:35 GMT, Erik Duveblad via github.com <duke at openjdk.java.net> wrote:

> Hi all,
> 
> this patch adds `ReadOnlyRepository::contains` that checks if a given hash `h` resides in the given branch `b`. I also added small unit test case, it was hard to add more elaborate tests given that `HgRepository::branch` creates a bookmark and not a branch.
> 
> ## Testing
> - [x] `sh gradlew test` passes
> - [x] Added a small unit test
> 
> Thanks,
> Erik
> 
> ----------------
> 
> Commits:
>  - d0559535:	Add ReadOnlyRepository::contains
> 
> Pull request:
> https://git.openjdk.java.net/skara/pull/96
> 
> Webrev:
> https://webrevs.openjdk.java.net/skara/96/webrev.00
> 
> Patch:
> https://git.openjdk.java.net/skara/pull/96.diff
> 
> Fetch command:
> git fetch https://git.openjdk.java.net/skara pull/96/head:pull/96

This PR has been reviewed by Robin Westberg via github.com - changes are approved. Review comment:

Looks good!

PR: https://git.openjdk.java.net/skara/pull/96