Incremental: don't abort container if one member explicitly disabled.

If a member of a container is explicitly disabled, others may not
be so we should continue.

Signed-off-by: NeilBrown <neilb@suse.de>

Incremental.c

@@ -1534,7 +1534,7 @@ static int Incremental_container(struct supertype *st, char *devname,
 					pr_err("array %s/%s is "
 					       "explicitly ignored by mdadm.conf\n",
 					       match->container, match->member);
-				return 2;
+				continue;
 			}
 			if (match)
 				trustworthy = LOCAL;