RFR: 134: BotRunnerConfiguration cannot parse hosts

[Erik Helin]

Hi all,

this patch fixes a bug that was introduced after the `host` module split. We must separate the different kinds of hosts in the bot configuration file, otherwise the `BotRunnerConfiguration` can't do sanity checking on the configuration.

Thanks,
Erik

## Testing
- [x] `sh gradlew test` passes
- [x] `sh gradlew images` passes

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Commits:
 - 9e30a6b2: 134: BotRunnerConfiguration cannot parse hosts

Changes: https://git.openjdk.java.net/skara/pull/209/files
 Webrev: https://webrevs.openjdk.java.net/skara/209/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-134
  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/skara/pull/209.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/209/head:pull/209

PR: https://git.openjdk.java.net/skara/pull/209