We used `set +e` before bdev deletion RPCs and
`wait $fio_pid`. Disabling errors from those RPCs
doesn't make sense. We expect FIO to fail due to
bdev hotremoval, but the bdev hotremoval itself
must succeed.
Besides, it's easy to forget to undo `set +e` so
don't use it. For `wait` we can use the following
paradigm instead:
```
rc=0
wait $pid || rc=$?
```
Change-Id: I8716bd861eae85d7a8590d4bd26a65cfa10e0dc1
Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/457469
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
4cc2d1d814