performance model: minor cleanups
	get HBA speed out of parm dictionary
performance model:
	compute percentage by why queuing delays operations
	add time and percentage thresholds to queuing delay reporting
	fix a comparison sense bug in read parallelism
performance model:	fix deprecated prints
	eliminate a few non-parenthesized print args (from ceph-tools)
Gateway performance:
	new queuing delay and saturation checking
	compute NIC utuilization based on wire-time (vs raw bw)
	added multi-server support to Gateway
performance model: parametrize block sizes
	make the range of block sizes to be tested parameters
	add values to the test.py dictionary
performance model:	refactoring/cleanup
	moved Server and Gateway instantiation into routines
	where I can encapsulate knowledge of the defining dicts