[BUG] databricks script failed to return correct exit code

[pxLi]

I accidentally found db test nightly failures (#3017) was not reported correctly. This was introduced by #2880,
where
if [ echo ${PIPESTATUS[0]} -ne 0 ];
should be
if [ ${PIPESTATUS[0]} -ne 0 ]; or if [ `echo ${PIPESTATUS[0]}` -ne 0 ];