RFR: 1428: New reviews message always adds plural 's'

[Erik Joelsson]

The new message for listing review requirements in the progress list always adds a plural 's' regardless of the number of reviews required. We should change this so that it's only added when there are 2 or more reviews required.

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Commit messages:
 - SKARA-1428

Changes: https://git.openjdk.java.net/skara/pull/1317/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=1317&range=00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-1428
  Stats: 49 lines in 3 files changed: 2 ins; 0 del; 47 mod
  Patch: https://git.openjdk.java.net/skara/pull/1317.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/1317/head:pull/1317

PR: https://git.openjdk.java.net/skara/pull/1317