Fix typo
Fix typo

${OCF_RESKEY_pid_file} is undefined,
as result mysqld always stops by SIGKILL

Closes-bug: #1626616
Change-Id: Ie5176c74caf55a6db1f84f9733f1a72adc7ea9f2

stackforge/fuel-library,stackforge/fuel-library,stackforge/fuel-library,stackforge/fuel-library