RFR: 1885: Add method deleteDeployKeys to HostedRepository [v2]

[Zhao Song]

> The method deleteDeployKeys is designed to delete deploy keys from this repository.

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

  use duration

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

Changes:
  - all: https://git.openjdk.org/skara/pull/1505/files
  - new: https://git.openjdk.org/skara/pull/1505/files/ccd47c15..956b72a2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=skara&pr=1505&range=01
 - incr: https://webrevs.openjdk.org/?repo=skara&pr=1505&range=00-01

  Stats: 18 lines in 7 files changed: 7 ins; 1 del; 10 mod
  Patch: https://git.openjdk.org/skara/pull/1505.diff
  Fetch: git fetch https://git.openjdk.org/skara.git pull/1505/head:pull/1505

PR: https://git.openjdk.org/skara/pull/1505