SPARK-1494 Don't initialize classes loaded by MIMA excludes.

[WIP]  Just seeing how Jenkins likes this...

Author: Michael Armbrust <michael@databricks.com>

Closes #494 from marmbrus/mima and squashes the following commits:

6eec616 [Michael Armbrust] Force hive tests to run.
acaf682 [Michael Armbrust] Don't initialize loaded classes.
(cherry picked from commit 8e950813334dd8545357f59f4ed77c39ee4180b3)

Signed-off-by: Patrick Wendell <pwendell@gmail.com>
[SQL] SPARK-1571 Mistake in java example code

Author: Michael Armbrust <michael@databricks.com>

Closes #496 from marmbrus/javaBeanBug and squashes the following commits:

644fedd [Michael Armbrust] Bean methods must be public.

(cherry picked from commit 39f85e0322cfecefbc30e7d5a30356cfab1e9640)
Signed-off-by: Reynold Xin <rxin@apache.org>