Ensure mysql.server stop can find the pid file
Ensure mysql.server stop can find the pid file

- The mysql.server script uses my_print_defaults to discover settings in
the my.cnf file
- The mysql.server script looks for 'pid-file' but we were specifying
the server variable as 'pid_file'

[#128544455]

Signed-off-by: Andrew Crump <bad96bc28586e95c5d7da81c13d926ea5028b22f@pivotal.io>

cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release