RFR: 1890: Add method getExpiredDeployKeys [v2]

[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 method name

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Changes:
  - all: https://git.openjdk.org/skara/pull/1508/files
  - new: https://git.openjdk.org/skara/pull/1508/files/50099540..b4acf2ac

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=skara&pr=1508&range=01
 - incr: https://webrevs.openjdk.org/?repo=skara&pr=1508&range=00-01

  Stats: 7 lines in 7 files changed: 0 ins; 0 del; 7 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