Cleanup pid on abnormal exit
Cleanup pid on abnormal exit

If unlocking the security keys or loading the
plugins experiences an error, do not leave a
stale pid file behind.

chenglch/confluent,jufm/confluent,chenglch/confluent,xcat2/confluent,xcat2/confluent,jufm/confluent,whowutwut/confluent,chenglch/confluent,whowutwut/confluent,chenglch/confluent,jjohnson42/confluent,jjohnson42/confluent,jufm/confluent,jjohnson42/confluent,chenglch/confluent,jufm/confluent,whowutwut/confluent,xcat2/confluent,xcat2/confluent,jufm/confluent,whowutwut/confluent,jjohnson42/confluent,jjohnson42/confluent,xcat2/confluent