RFR: 1890: Add method getExpiredDeployKeys [v3]

[Zhao Song]

> Add a new method called getExpiredDeployKeys in HostedRepository

Zhao Song has updated the pull request incrementally with one additional commit since the last revision:

  update tests name

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

Changes:
  - all: https://git.openjdk.org/skara/pull/1508/files
  - new: https://git.openjdk.org/skara/pull/1508/files/b4acf2ac..7b4f36d9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=skara&pr=1508&range=02
 - incr: https://webrevs.openjdk.org/?repo=skara&pr=1508&range=01-02

  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/skara/pull/1508.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1508/head:pull/1508

PR: https://git.openjdk.org/skara/pull/1508