Harmonize extracting issue ids from matched pattern

ItsValitadeComment only considered the first group as issue id, while
the code that got moved from GerritHookFilter to IssueExtractor
considered each group as issue id.
We now uniformly only treat the first group as issue id.

Change-Id: Ib3d9a75bab8842a25f13113d21bc361aae71d8f8
2 files changed
tree: bc256c487cd3e699772257fb2b63ca74b78e1a16
  1. .gitignore
  2. LICENSE
  3. hooks-its/
  4. pom.xml