RFR: 1201: Multiple command reply messages include 'HostUserDetails' [v2]

[Magnus Ihse Bursie]

> Fixing this as the bug reporter suggested, by removing all explicit (broken or not) and duplicated constructions of "@" + username in the command replies, and adding a general @-mention in CommitCommands as well as PR Commands.

Magnus Ihse Bursie has updated the pull request incrementally with one additional commit since the last revision:

  Fix tests that broke

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Changes:
  - all: https://git.openjdk.java.net/skara/pull/1231/files
  - new: https://git.openjdk.java.net/skara/pull/1231/files/2a897832..2bc294b5

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=skara&pr=1231&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=skara&pr=1231&range=00-01

  Stats: 12 lines in 4 files changed: 0 ins; 0 del; 12 mod
  Patch: https://git.openjdk.java.net/skara/pull/1231.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/1231/head:pull/1231

PR: https://git.openjdk.java.net/skara/pull/1231