Starts a subsystem by requiring data from the network.
tow different options:
- no argument provided to the call: the boot code broadcast the MAC address and waits for command
- arguments provided subsystem name, configuration name , tag: the boot code broadcasts a request and waits for a command
if time out it searches of a local file in the cache
if property
org.lsst.ccs.testcontext is set then the status message notifies server that only a test server
should be used.