qemu: pci_hotplug - Introduce hotplug_timeout

If we set the global test timeout as the timeout for
the hotplug operation, if it is reached due to a QEMU
bug the test will never end properly while executing
under autotest. So enforce a specific timeout,
a lot smaller than the typical global test timeout.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

qemu/tests/cfg/pci_hotplug.cfg

@@ -5,6 +5,7 @@
     pci_num = 1
     repeat_times = 1
     wait_secs_for_hook_up = 3
+    hotplug_timeout = 360
     variants:
         - with_reboot:
             sub_type_after_unplug = boot

qemu/tests/pci_hotplug.py

@@ -240,7 +240,7 @@ def run_pci_hotplug(test, params, env):
     timeout = int(params.get("login_timeout", 360))
     session = vm.wait_for_login(timeout=timeout)
 
-    test_timeout = int(params.get("test_timeout", 360))
+    test_timeout = int(params.get("hotplug_timeout", 360))
     reference_cmd = params["reference_cmd"]
     # Test if it is nic or block
     pci_type = params["pci_type"]