Check for proxy conflicts in client_configuration and environment variable

Author: sbahar619

ocp_resources/resource.py

@@ -123,6 +123,11 @@ def get_client(
                 raise ValueError(
                     "Proxy configuration is enabled but neither HTTPS_PROXY nor HTTP_PROXY environment variables are set."
                 )
+            if client_configuration.proxy and client_configuration.proxy != proxy:
+                raise ValueError(
+                    f"Conflicting proxy settings: client_configuration.proxy={client_configuration.proxy}, "
+                    f"but the environment variable 'OPENSHIFT_PYTHON_WRAPPER_CLIENT_USE_PROXY' defines proxy as {proxy}."
+                )
             client_configuration.proxy = proxy
 
         return kubernetes.dynamic.DynamicClient(