5.5.x: full data load failure: planner tests failing due to file size change

http://sandbox.jenkins.cloudera.com/view/Impala/view/Builds%20-%202.3.0%20Release/job/impala-cdh5.5.x-nightly-data-load/33/testReport/junit/com.cloudera.impala.planner/PlannerTest/testNestedCollections/

We really need to make the planner test smarter to not care about file size, but for now I'll do the quick fix of updating the sizes to get the builds passing again.