core: clean up businessentity hashCode() methods [part 1]

Organize hashCode() methods into a consistent format and consistent
ordering with equals().  This will make field-by-field comparison and
maintenance easier.

Change-Id: Ia9a7f60883e6f118690cee4a53d7705f288a2f24
Signed-off-by: Greg Padgett <gpadgett@redhat.com>