Add hotplug endpoint to test API representation

Extend the python test API to include the hotplug endpoint.

Signed-off-by: James Curtis <jxcurtis@amazon.co.uk>

Author: JamesC1305

tests/framework/http_api.py

@@ -123,3 +123,4 @@ def __init__(self, api_usocket_full_name):
         self.snapshot_load = Resource(self, "/snapshot/load")
         self.cpu_config = Resource(self, "/cpu-config")
         self.entropy = Resource(self, "/entropy")
+        self.hotplug = Resource(self, "/hotplug")