Refactored code for setting embargo so that most of it is not within if
(!isTest){} conditions (Jay's request). Updated date parsing unit tests
in EmbargoHelperTest.java. Removed -embargoTest flag because it was not
necessary. Fixed -g switch (thanks to Paul). The line with
SetEmbargoTest.class is commented out in ItemImport.java because it
always failed to load the class during runtime.