Bug 630092 - Coverity #15485: Resource leaks issues

https://bugzilla.redhat.com/show_bug.cgi?id=630092

Description:

The _entryrdn_delete_key() has been modified to release tmpsrdn
when an error occurs.

ldap/servers/slapd/back-ldbm/ldbm_entryrdn.c

@@ -2363,6 +2363,7 @@ retry_get0:
                         "_entryrdn_delete_key: Failed to generate a parent "
                         "elem: dn: %s\n", dn);
                 slapi_ch_free_string(&dn);
+                slapi_rdn_free(&tmpsrdn);
                 goto bail;
             }
         } else if (parentnrdn) {