Add protobuf generated files to Eclipse project classpath.
Add protobuf generated files to Eclipse project classpath.

With this change Eclipse can compile all Kudu Java projects
and can run JUnit tests directly

Change-Id: I825002ce8436467cb9c32c0954f378e1959a5586
Reviewed-on: http://gerrit.cloudera.org:8080/11310
Reviewed-by: Grant Henke <4cf7ebbe638391c4d27a10cf751b99bdbd1a1880@apache.org>
Tested-by: Grant Henke <4cf7ebbe638391c4d27a10cf751b99bdbd1a1880@apache.org>

helifu/kudu,helifu/kudu,InspurUSA/kudu,InspurUSA/kudu,InspurUSA/kudu,InspurUSA/kudu,InspurUSA/kudu,InspurUSA/kudu,helifu/kudu,helifu/kudu,InspurUSA/kudu,helifu/kudu,InspurUSA/kudu,helifu/kudu,InspurUSA/kudu,helifu/kudu,helifu/kudu,helifu/kudu