[pm] added openDBFromConfigFile

this will enable the software to open an sqlite config file based on
the file specified on the powerdaemon config file
[pm] adding DB operations to thin client ops
[pm] adding DB file to Config file via 'mapfile'
[pm] 5 seconds grace period

instead of adding the ThinClient right away from PoE Notification, the
powerdaemon will delay by 5 seconds to ensure that the thin client has
booted up already. This will ensure that we get the most current ip
address for the for thin client
[pm] change MACFILE to MAPFILE