Trove guestagent should not use sample conf

Fixed the trove guestagent to use the config file from
/etc/trove/trove-guestagent.conf instead of using the sample
conf from the trove/etc directory.

Closes-bug: 1176102
Change-Id: I7c55198d6d93f5e909c3b3d9085c08d88561f376
Merge "Trove guestagent should not use sample conf"