[wmi] set provider architecture when necessary

On Windows 2008, setting a WMI provider would cause an exception.
To prevent this from unecessarily happening, only proceed when the
provided value is not set to the default one.

Author: Yann MAHE

checks/libs/wmi/sampler.py

@@ -334,16 +334,17 @@ def get_connection(self):
         # shouldn't be used in other threads (can lead to memory/handle leaks if done
         # without a deep knowledge of COM's threading model). Because of this and given
         # that we run each query in its own thread, we don't cache connections
-        context = None
+        additional_args = []
         pythoncom.CoInitialize()
 
         if self.provider != ProviderArchitecture.DEFAULT:
             context = Dispatch("WbemScripting.SWbemNamedValueSet")
             context.Add("__ProviderArchitecture", self.provider)
+            additional_args = [None, "", 128, context]
 
         locator = Dispatch("WbemScripting.SWbemLocator")
         connection = locator.ConnectServer(
-            self.host, self.namespace, self.username, self.password, None, "", 128, context
+            self.host, self.namespace, self.username, self.password, *additional_args
         )
 
         return connection