TESTS: Add tests that get_lba_status for a single range works

Add a test for unmapping a single range of blocks and that
get_lba_status returns correct data.

Test unmapping a single block at offsets 0-255

Test unmapping 1-255 blocks at offset 0 and verify that
get_lba_status at LBA 0 returns a descriptor of 1-255 blocks.
get_lba_status at the last block of the unmapped range returns
a descriptor for a single block.

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>

test-tool/iscsi-test-cu.c

@@ -71,6 +71,7 @@ static CU_TestInfo tests_compareandwrite[] = {
 static CU_TestInfo tests_get_lba_status[] = {
 	{ (char *)"Simple", test_get_lba_status_simple },
 	{ (char *)"BeyondEol", test_get_lba_status_beyond_eol },
+	{ (char *)"UnmapSingle", test_get_lba_status_unmap_single },
 	CU_TEST_INFO_NULL
 };