DRILL-1309:  Implement ProjectPastFilterPushdown and update DrillScanRel cost model so that exclusive column so that star query is more expensive than exclusive column projection. Various fixes affecting record reaaders to handle `*` column as well as fixes to some test cases.

exclude parquet files from rat check
Merge branch 'merge_14_08_27b' of github.com:hnfgns/incubator-drill into merge_14_08_27b