Running pubber with non existent device results in non-friendly error

[noursaidi]

When running pubber with a device which does not exist, there is no user friendly error message

nournew@macbook-2 udmi % bin/pubber ~/udmi_site_model daq1-273309 AHU-9 567   
Building pubber...
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Running tools version 1.3.12-79-g2faea092
Exception in thread "main" java.lang.NullPointerException
	at daq.pubber.Pubber.processDeviceMetadata(Pubber.java:283)
	at daq.pubber.Pubber.loadDeviceMetadata(Pubber.java:266)
	at daq.pubber.Pubber.initializeDevice(Pubber.java:344)
	at daq.pubber.Pubber.initialize(Pubber.java:511)
	at daq.pubber.Pubber.singularPubber(Pubber.java:214)
	at daq.pubber.Pubber.main(Pubber.java:199)
nournew@macbook-2 udmi % git pull