Converted first PGR test to new CUnit format

Here's the patch that really adds the new test ... plz let me know if I did this incorrectly.
---------------------------------------------------------------
parent 93fd84ab52bc56f889dbd7970345d205ce03f958 (1.7.0-238-g93fd84a)
commit c5aa45226d054389280b763ce5754c5fa647b05c
Author: Lee Duncan <lduncan@suse.de>
Date:   Wed Feb 6 13:43:08 2013 -0800

Converted first PGR test to new CUnit format

test-tool/test_prin_read_keys_simple.c

@@ -0,0 +1,57 @@
+/* 
+   Copyright (C) 2013 by Lee Duncan <lee@gonzoleeman.net>
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+   
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdio.h>
+#include <arpa/inet.h>
+
+#include <CUnit/CUnit.h>
+
+#include "iscsi.h"
+#include "scsi-lowlevel.h"
+#include "iscsi-support.h"
+#include "iscsi-test-cu.h"
+
+
+void
+test_prin_read_keys_simple(void)
+{
+	int ret = 0;
+	int al;
+
+
+	logging(LOG_VERBOSE, "");
+	logging(LOG_VERBOSE, "Test Persistent Reserve IN READ_KEYS works.");
+
+	ret = prin_read_keys(iscsic, tgt_lun, &task, NULL);
+	CU_ASSERT_EQUAL(ret, 0);
+
+	logging(LOG_VERBOSE, "Test DATA-IN is at least 8 bytes.");
+	if (task->datain.size < 8) {
+		logging(LOG_NORMAL,
+		    "[FAILED] DATA-IN returned less than 8 bytes");
+		return;
+	}
+
+	logging(LOG_VERBOSE, "Test ADDITIONAL_LENGTH matches DATA_IN size.");
+	al = ntohl(*(uint32_t *)&task->datain.data[4]);
+	if (al != task->datain.size - 8) {
+		logging(LOG_NORMAL,
+		    "[FAILED] ADDITIONAL_LENGTH was %d bytes but %d was expected.",
+			al, task->datain.size - 8);
+		return;
+	}
+}