Returns the deadline for the current schedule in the following format:
"OK"+ "{ 'minimise' : 'algorithm-here' , 'budget' : budget-here, 'deadline' : deadline-here}"+'\n'
The deadline is a date in "long" format ( seconds ).
Gets the next "N" servers available from the persistent store,
This method sequentially goes through the servers in the database, starting from the first.
Constructor - initializes GridbusFarmingEngine
If the BrokerProperties are not set, then it sets it up by looking at the Broker.properties file
If Broker.properties is not found, then default configuration properties are used.