InventoryPlugin should operate correctly if the http_port in scheduler.xml has binding to a specific host

Current Situation
If a user binds a host in the http_port attribute of the scheduler.xml like hostname:port the InventoryPlugin cannot connect to localhost via http anymore.

Desired Behavior
If a user binds a host in the http_port attribute of the scheduler.xml the InventoryPlugin should use this host instead of localhost to make sure that the used http connections operate correctly.

Workaround
To make sure that the InventoryPlugin is able to operate, remove the host binding from the http_port attribute in scheduler.xml OR bind it to localhost like localhost:port.