RFR: TestHostedRepository::getPullRequests should only return open PRs

[Erik Duveblad via github.com]

The pull request has been updated with additional changes.

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

Added commits:
 - 16f34425:	Use package private for isOpen
			Co-Authored-By: Robin Westberg <robin at westberg.se>

Pull request:
https://git.openjdk.java.net/skara/pull/102

Webrevs:
 - full: https://webrevs.openjdk.java.net/skara/102/webrev.01
 - inc: https://webrevs.openjdk.java.net/skara/102/webrev.00-01

Updated full patch:
https://git.openjdk.java.net/skara/pull/102.diff

Fetch command:
git fetch https://git.openjdk.java.net/skara pull/102/head:pull/102