Fix data loading to not use Impala infrastructure.
Fix data loading to not use Impala infrastructure.

A few reasons to start to roll our own:
  1. We don't need nearly the complexity Impala has (we probably just need a handful
  of test tables and the formats don't matter).
    - This also reduces test time/flakiness/etc.
  2. We'll want to add tables that Impala doesn't currently have since it's not what
  we need and those merges will be bad.
  3. When we move out of the Impala source tree, relying heavily on those internals
  will be bad.

Change-Id: Ia1a6c4a6a5860ea01f425ff88b2d270e68bf2a5e

cloudera/recordservice,cloudera/recordservice,cloudera/recordservice,cloudera/recordservice,cloudera/recordservice,cloudera/recordservice,cloudera/recordservice