Add support for ECDSA keys
[maven-release-plugin] prepare release ssh-credentials-1.8
[maven-release-plugin] prepare for next development iteration
[FIXED JENKINS-24273] Thrilead SSH throws IOE when passed an unknown keytype
[maven-release-plugin] prepare release ssh-credentials-1.9
[maven-release-plugin] prepare for next development iteration
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  [maven-release-plugin] prepare for next development iteration
  [maven-release-plugin] prepare release ssh-credentials-1.9
  [FIXED JENKINS-24273] Thrilead SSH throws IOE when passed an unknown keytype
  [maven-release-plugin] prepare for next development iteration
  [maven-release-plugin] prepare release ssh-credentials-1.8
  Add support for ECDSA keys