Hopefully better handling of task creation fails if group task is to be started while a task is already set for one of the hosts.  Per Mentaloid's edits I've added a checker to wait for the network interface to be up before trying to run the services.

git-svn-id: https://svn.code.sf.net/p/freeghost/code/trunk@2209 71f96598-fa45-0410-b640-bcd6f8691b32
Merge svn with master