run_utah_tests in trunk ignoring -s and -t options

The -s and -t options are being ignored because of the new function we've added:

def _get_unprovisioned_machine(args, image=None):
    if image is None:
        image = ISO(arch=args.arch, installtype=config.installtype, series=config.series)

we are passing config values rather than command line arg values. the fix is simple:

diff --git a/examples/run_utah_tests.py b/examples/run_utah_tests.py
index fe45b75..95529c3 100755
--- a/examples/run_utah_tests.py
+++ b/examples/run_utah_tests.py
@@ -52,8 +52,7 @@ except ImportError:

 def _get_unprovisioned_machine(args, image=None):
     if image is None:
- image = ISO(arch=args.arch, installtype=config.installtype,
- series=config.series)
+ image = ISO(arch=args.arch, installtype=args.type, series=args.series)
     kw = {'clean': (not args.no_destroy),
           'boot': args.boot,
           'debug': args.debug,