Merge JAAS / LDAP /other flows?

[Cantor, Scott]

I started looking at the native Kerberos flow, and it became obvious that
I could have combined the two password flows for JAAS and LDAP into one
flow now that I'm more familiar with Spring and how to avoid bean errors
when things don't have to be used.

This seems like an obvious simplification and reduces duplicate beans
between the two flows, is one less non-trivial flow to maintain, and
should be switchable between any back-end validation action by just
changing an import from one set of beans to another. The imported file can
alias the back-end to use into the right bean name for the flow action to
evaluate.

-- Scott