[skara] RFR: Construct a proper SSH URI

[Robin Westberg]

When using SSH with GitLab, create a proper SSH URI to avoid unnecessary string manipulation later.

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Commit messages:
 - Construct a proper ssh uri

Changes: https://git.openjdk.java.net/skara/pull/1068/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=1068&range=00
  Stats: 15 lines in 2 files changed: 0 ins; 8 del; 7 mod
  Patch: https://git.openjdk.java.net/skara/pull/1068.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/1068/head:pull/1068

PR: https://git.openjdk.java.net/skara/pull/1068