2014.11.07 MSS Code Factory 1.11.12552 DB/2 LUW Chain support complete

It turns out that PostgreSQL exhibits the same problem if 0034-CreateComplexObjects
is rerun.  The problem was actually with the XML SAX parser, not the stored procedures
for DB/2 LUW or PostgreSQL.  There was no checking in place for the Chain relationships,
so the second time a SchemaDef was loaded for update, the parser dutifully noted
that the values for Prev/Next were null and clobbered the Chain links.  That has
been corrected.

Both PostgreSQL and DB/2 LUW now pass all their Chain data tests.