git: openjdk/skara: Enable Mercurial support for "pr create"

[duke]

Changeset: 2ae213d1
Author:    Erik Helin <ehelin at openjdk.org>
Date:      2019-09-12 12:31:53 +0000
URL:       https://github.com/openjdk/skara/commit/2ae213d1

Enable Mercurial support for "pr create"

Reviewed-by: rwestberg

! cli/src/main/java/org/openjdk/skara/cli/GitPr.java
+ vcs/src/main/java/org/openjdk/skara/vcs/Bookmark.java
! vcs/src/main/java/org/openjdk/skara/vcs/ReadOnlyRepository.java
! vcs/src/main/java/org/openjdk/skara/vcs/git/GitRepository.java
! vcs/src/main/java/org/openjdk/skara/vcs/hg/HgRepository.java