IMPALA-3241: Send dummy filters for non-partitioned joins
IMPALA-3241: Send dummy filters for non-partitioned joins

This is the non-partitioned hash-join counterpart for IMPALA-3141,
sending dummy filters when no real filter will be produced.

Tested manually with PHJ disabled.

Change-Id: I54be1e0f4282641a451bcf765c29189432dea0b3
Reviewed-on: http://gerrit.cloudera.org:8080/2649
Reviewed-by: Marcel Kornacker <44592b4eea36663c86b994bb0ea99d15309c1c7d@cloudera.com>
Tested-by: Internal Jenkins

kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala,kapilrastogi/Impala