Integrated: Adjust expiration times for checking external data

[Robin Westberg]

This minor change adjusts the expiration times for a few external data sources, to avoid too frequent polling.

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Commit messages:
 - Decrease polling intervals

Changes: https://git.openjdk.java.net/skara/pull/869/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=869&range=00
  Stats: 3 lines in 2 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/skara/pull/869.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/869/head:pull/869

PR: https://git.openjdk.java.net/skara/pull/869