Add necessary output to auto_delete_nightly_test_data script and return with meaning exit code.

The script did not have any output in case of a success run, which
means we do not get emails about this cron job. Also the exit code was
always 0. Fixed by adding print statements and return correct exit
code.

TEST=None
BUG=None

Change-Id: If06a4d57a94387494f9c1b30fea765f66e6e0f56
Reviewed-on: https://chrome-internal-review.googlesource.com/161302
Reviewed-by: Caroline Tice <cmtice@google.com>
Commit-Queue: Han Shen <shenhan@google.com>
Tested-by: Han Shen <shenhan@google.com>
1 file changed