avro

AVRO-1887 Integrate Yetus and fix tests (#353)

* AVRO-1887 Setup precommit checks via Apache Yetus

Signed-off-by: sacharya <suraj.spa@gmail.com>

* AVRO-1887 Integrate Yetus

Add a precommit hook using Apache Yetus that will invoke the test
suite of the different languages

- Disable Ruby integration tests tests
- Fix Flaky Java Datetime test
  When the milsecons would have trailing zero, it would get trimmed
- Align the order of imports