RFR: csr-bot: allow other bots to run

[Erik Helin]

Hi all,

please review this embarrassing patch that makes other bots allowed to run at
the same time as the `CSRBot`.

Testing:
- `make test` passes on Linux x64

Thanks,
Erik

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

Commit messages:
 - csr-bot: allow other bots to run

Changes: https://git.openjdk.java.net/skara/pull/544/files
 Webrev: https://webrevs.openjdk.java.net/skara/544/webrev.00
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/skara/pull/544.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/544/head:pull/544

PR: https://git.openjdk.java.net/skara/pull/544