Small update of tests for transmission line functions
Small update of tests for transmission line functions

Switched to the new definition of gamma and used random number instead of constants for voltage and current
temmeand/scikit-rf,temmeand/scikit-rf,scikit-rf/scikit-rf,jhillairet/scikit-rf,jhillairet/scikit-rf,jhillairet/scikit-rf,temmeand/scikit-rf,scikit-rf/scikit-rf