tests: Modify the scsi util tests

Add tests/virscsidata/sg0 and tests/virscsidata/sg8 as the test
input for constructing scsi->sg_path. And change the scsi generic
number of "1:0:0:0", because it's easy to hide the problem (assuming
most machines have a CDROM drive).
Signed-off-by: NOsier Yang <jyang@redhat.com>

tests/virscsitest.c

@@ -43,7 +43,7 @@ test1(const void *data ATTRIBUTE_UNUSED)
                                          "scsi_host1", 0, 0, 0)))
         return -1;
 
-    if (STRNEQ(name, "sr0"))
+    if (STRNEQ(name, "sdh"))
         goto cleanup;
 
     ret = 0;
@@ -72,7 +72,7 @@ test2(const void *data ATTRIBUTE_UNUSED)
     sgname = virSCSIDeviceGetSgName(virscsi_prefix,
                                     "scsi_host1", 0, 0, 0);
 
-    if (!sgname || STRNEQ(sgname, "sg1"))
+    if (!sgname || STRNEQ(sgname, "sg8"))
         goto cleanup;
 
     if (!(dev = virSCSIDeviceNew(virscsi_prefix, "scsi_host1",