[Rev 01] RFR: Upgrade the notifier database lazily

[Robin Westberg]

> Hi all,
> 
> Please review this change that updates the notifier database for pull requests only for active PRs.
> 
> Best regards,
> Robin

Robin Westberg has updated the pull request incrementally with one additional commit since the last revision:

  Updated schema migration logic

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

Changes:
  - all: https://git.openjdk.java.net/skara/pull/657/files
  - new: https://git.openjdk.java.net/skara/pull/657/files/203cdbe3..c939a1bf

Webrevs:
 - full: https://webrevs.openjdk.java.net/skara/657/webrev.01
 - incr: https://webrevs.openjdk.java.net/skara/657/webrev.00-01

  Stats: 7 lines in 1 file changed: 1 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/skara/pull/657.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/657/head:pull/657

PR: https://git.openjdk.java.net/skara/pull/657