Tests for serial + python 3 fix for rfc2217
adds test for serial module and highlights problems related to #921 with ser2net 3.4
test are based based on !1389 using a lose branch 651-serial-refactoring-august that has been rebased on 06/08/2019
adds test for serial module and highlights problems related to #921 with ser2net 3.4
test are based based on !1389 using a lose branch 651-serial-refactoring-august that has been rebased on 06/08/2019