bus class defaults to case insensitive, which is a deviation from previous behavior

[s3bs]

cocotb-bus/src/cocotb_bus/bus.py

Line 31 in 7962b53

def __init__(self, entity, name, signals, optional_signals=[], bus_separator="_", case_insensitive=True, array_idx=None):

^^ this got introduced here #19

I'm just in the process of migrating old simulations and this is causing issues as cocotb now tries to travers additional hierarchy objects that it wouldn't otherwise and is causing extra overhead to fix.