RFR: 1627: Add tests for bot factories [v5]

[Zhao Song]

> Add some tests for BotFactories.

Zhao Song has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:

  Added more tests in botFactory tests

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Changes:
  - all: https://git.openjdk.org/skara/pull/1393/files
  - new: https://git.openjdk.org/skara/pull/1393/files/693df804..c1ad3cbe

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=skara&pr=1393&range=04
 - incr: https://webrevs.openjdk.org/?repo=skara&pr=1393&range=03-04

  Stats: 511 lines in 28 files changed: 245 ins; 160 del; 106 mod
  Patch: https://git.openjdk.org/skara/pull/1393.diff
  Fetch: git fetch https://git.openjdk.org/skara pull/1393/head:pull/1393

PR: https://git.openjdk.org/skara/pull/1393