zdtm: clean up test_fork

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm/lib/test.c

@@ -32,17 +32,9 @@ TEST_OPTION(pidfile, string, "file to store pid", 1);
 
 static pid_t master_pid = 0;
 
-int proc_id = 0;
-static int proc_id_cur = 0;
-
 int test_fork_id(int id)
 {
-	pid_t pid = fork();
-	if (id < 0)
-		id = ++proc_id_cur;
-	if (pid == 0)
-		proc_id = id;
-	return pid;
+	return fork();
 }
 
 #define INPROGRESS ".inprogress"