Use syncprov overlay

tests/data/slapd-syncrepl-slave-persist1.conf

@@ -27,6 +27,8 @@ argsfile    ./testrun/slapd.4.args
 #mod#moduleload	back_@BACKEND@.la
 #monitormod#modulepath ../servers/slapd/back-monitor/
 #monitormod#moduleload back_monitor.la
+#syncprovmod#modulepath ../servers/slapd/overlays/
+#syncprovmod#moduleload syncprov.la
 
 #######################################################################
 # consumer database definitions
@@ -56,4 +58,6 @@ syncrepl rid=1
 		 scope=sub
 		 type=refreshAndPersist
 
+overlay syncprov
+
 #monitor#database monitor

tests/data/slapd-syncrepl-slave-refresh1.conf

@@ -27,6 +27,8 @@ argsfile    ./testrun/slapd.2.args
 #mod#moduleload	back_@BACKEND@.la
 #monitormod#modulepath ../servers/slapd/back-monitor/
 #monitormod#moduleload back_monitor.la
+#syncprovmod#modulepath ../servers/slapd/overlays/
+#syncprovmod#moduleload syncprov.la
 
 #######################################################################
 # consumer database definitions
@@ -59,4 +61,7 @@ syncrepl rid=1
 		 type=refreshOnly
 		 interval=00:00:00:10
 
+overlay syncprov
+
+
 #monitor#database monitor