BUGFIX 7811: Adding file existence check when performing mysql import on a .gz or .bz2 file, otherwise Ansible will not notice that the underlying *nix command silently died.
BUGFIX 1178: Adding better existence check in one place.  db_import now fails fast if target does not exist b/c no point going further without the target.
Merge pull request #7814 from scottbrown/bugfix-7811-mysql_import_does_not_perform_dump_existence_check

BUGFIX for Issue 7811: Adding file existence check when performing mysql import on...