RFR: 2109: Fix failing test BranchCommitCommandTests.nonConformingBranch

[Erik Duveblad]

Hi all,

please review this small patch that adds a missing `.get()` in a message by the `BranchCommand`. The failing unit tests is now passing (I also removed some spurious logging from unit tests).

Thanks,
Erik

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Commit messages:
 - skara-2109

Changes: https://git.openjdk.org/skara/pull/1589/files
 Webrev: https://webrevs.openjdk.org/?repo=skara&pr=1589&range=00
  Issue: https://bugs.openjdk.org/browse/SKARA-2109
  Stats: 3 lines in 2 files changed: 0 ins; 2 del; 1 mod
  Patch: https://git.openjdk.org/skara/pull/1589.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1589/head:pull/1589

PR: https://git.openjdk.org/skara/pull/1589