property get on apihost and auth report blank values

[rabbah]

> WSK_CONFIG_FILE= ./wsk property get --apihost x
whisk API host		
> WSK_CONFIG_FILE= ./wsk property get --auth y
whisk auth		

The ambiguity here comes from "setup client" which consumes the values as part of the "global" --apihost/auth but these appear to also be treated as flags to "property get" and somewhere in between the value is lost.

The behavior is both buggy and startling.