xm-test: various fixes

- recently I added an other_config field to the VTPM record which now
needs to be accounted for otherwise the test determines a bad key
- the dry-run command was throwing a different type of exception
(ACMError) than what was caught (XSMError)
- the tests based on the raw Xen-API need to build the PV_args
parameters from the old 'root' and 'extra' parameters.

Signed-off-by: Stefan Berger <stefanb@us.ibm.com>

tools/python/xen/xm/create.py

@@ -1228,7 +1228,7 @@ def config_security_check(config, verbose):
             if verbose:
                 print "   %s: PERMITTED" % (resource)
 
-        except security.XSMError:
+        except security.ACMError:
             print "   %s: DENIED" % (resource)
             (poltype, res_label, res_policy) = security.get_res_label(resource)
             if not res_label: