DAOS-7043 engine: switch module unload and iv fini

Do IV fini before module unload, because iv_fini will
need some iv class operation, which might be destoryed
during module unload.

Signed-off-by: Di Wang <di.wang@intel.com>

src/engine/init.c

@@ -701,10 +701,10 @@ server_fini(bool force)
 	D_INFO("server_init_state_fini() done\n");
 	dss_srv_fini(force);
 	D_INFO("dss_srv_fini() done\n");
-	dss_module_unload_all();
-	D_INFO("dss_module_unload_all() done\n");
 	ds_iv_fini();
 	D_INFO("ds_iv_fini() done\n");
+	dss_module_unload_all();
+	D_INFO("dss_module_unload_all() done\n");
 	/*
 	 * Client stuff finalization needs be done after all ULTs drained
 	 * in dss_srv_fini().