Java test suite adjustments

Revert log levels to their values prior to commit
5534724c1c810d1367e8372563a8d29b5835ea1e.

Disabled unreliable test.pool.AGConnPoolSessionTest.maxActive and
test.pool.AGConnPoolClosingTest.openSockets_bug21099 tests.

Change-Id: I59e6d57c4c1a469cd1dea61bcf0c2b686faa48f1
Reviewed-on: https://gerrit.franz.com:9080/3639
Reviewed-by: Ahmon Dancy <dancy@franz.com>
Reviewed-by: Kevin Layer <layer@franz.com>
Tested-by: Kevin Layer <layer@franz.com>
Merge remote-tracking branch 'origin/v4.12.2' into v4.13