Undo test020 overwrite

tests/data/slapd.conf

+# $OpenLDAP$
 #
-# master slapd config -- for proxy cache testing
+# stand-alone slapd config -- for testing
+#	with indexing
 #
 ucdata-path	./ucdata
 include ./schema/core.schema
@@ -11,7 +13,8 @@ include ./schema/nis.schema
 pidfile     ./testrun/slapd.1.pid
 argsfile    ./testrun/slapd.1.args
 
-modulepath      ../servers/slapd/back-bdb/
+modulepath      ../servers/slapd/back-@BACKEND@/
+@MODULELOAD@
 
 
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