from Paul Turgyan of University of Michigan.

Split glue test in two.
Remove (slurpd) subtree replication test.
Reorder syncrepl/proxy tests

Should resolve ITS#2664.

Currently discovered via a "feature", but should use a control.
Start of a control made, but needs to be better integrated (with
auto use in ldapmodify(1)).

Fix invalid structural object class chains in test schema

the existing database "directory" directive) to allow setting
of a DB_ENV directory.  Should likely be database specific.

one set of slapd.conf files.