Extend qa to test hotplug support

Only if default hypervisor is KVM try all hotplug related actions.
Signed-off-by: Dimitris Aragiorgis <dimara@grnet.gr>
Signed-off-by: Thomas Thrainer <thomasth@google.com>
Reviewed-by: Thomas Thrainer <thomasth@google.com>

qa/qa-sample.json

@@ -219,6 +219,7 @@
     "instance-rename": true,
     "instance-shutdown": true,
     "instance-device-names": true,
+    "instance-device-hotplug": false,
 
     "job-list": true,
 

qa/qa_instance.py

@@ -534,6 +534,15 @@ def TestInstanceModify(instance):
       ["-H", "%s=acn" % constants.HV_BOOT_ORDER],
       ["-H", "%s=%s" % (constants.HV_BOOT_ORDER, constants.VALUE_DEFAULT)],
       ])
+  elif default_hv == constants.HT_KVM and \
+    qa_config.TestEnabled("instance-device-hotplug"):
+    args.extend([
+      ["--net", "-1:add", "--hotplug"],
+      ["--net", "-1:modify,mac=aa:bb:cc:dd:ee:ff", "--hotplug"],
+      ["--net", "-1:remove", "--hotplug"],
+      ["--disk", "-1:add,size=1G", "--hotplug"],
+      ["--disk", "-1:remove", "--hotplug"],
+      ])
 
   for alist in args:
     AssertCommand(["gnt-instance", "modify"] + alist + [instance.name])