Add 'use warnings;'
Get hostname from .bash_profile_cron. Rename $unique_db_name to
$config_db_name.
Made alert_monitor.pl, alert_monitor_rb.pl, dg_log_monitor.pl and
ggserr_log_monitor.pl look as similar as possible.
db_observer_monitor.pl: use .bash_profile_cron and SendAlert
gg_clear_log.sh: use $DB_ROLE_FILE from .bash_procfile_cron.