DAOS-15084 engine: seed for rand when engine start

Otherwise, different engines may generate the same pseudo random
sequence for rand() callers, that may cause trouble, for example
when raft vote for pool service leader election.

Signed-off-by: Fan Yong <fan.yong@intel.com>

Author: Nasf-Fan

src/engine/module.c

@@ -297,6 +297,8 @@ dss_module_setup_all(void)
 	struct loaded_mod      *mod;
 	int			rc = 0;
 
+	srand(dss_self_rank());
+
 	D_MUTEX_LOCK(&loaded_mod_list_lock);
 	d_list_for_each_entry(mod, &loaded_mod_list, lm_lk) {
 		struct dss_module *m = mod->lm_dss_mod;