Fix race in data loading by creating text tables first.

While loading parquet, there are a few table creation queries that use the 'like'
keyword; this ends up opening a small race window when all the table formats are created
concurrently. With this change, we create the text tables first before attempting to
parallelize the rest of the data loading.

Change-Id: Ib84cf0e5120b3588d3f0503d7119ca055e08e53f
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1241
Reviewed-by: Ishaan Joshi <ishaan@cloudera.com>
Tested-by: jenkins