Reduction of Rest.Py IxNetwork Configuration Time

[SubhajitPalKeysight]

In order to script using Rest.Py IxNework Configuration - script takes up some considerable amount of time. In underneath Rest.Py makes several incremental call ( http patch/push ) with IxNetwork. Idea is to reduce this configuration time . This can be achieved by committing configuration to IxNetwork only once. ( communication with IxNetwork is made only once. ) For that we can introduce an assistance in Rest.Py - Config Assistance to build up configuration at client side.