Investigate Flake8 Pickle Errors

[EmilyPascua]

Running Flake8 failed during pre-commit hooks due to Pickle related errors for AIT-Core:

ait/core/api.py:62:5: B042 Exception class with `__init__` should pass all args to `super().__init__()` to work in edge cases of `pickle` and `copy.copy()`. It should also not take any kwargs.
ait/core/api.py:86:5: B042 Exception class with `__init__` should pass all args to `super().__init__()` to work in edge cases of `pickle` and `copy.copy()`. It should also not take any kwargs.
ait/core/cmd.py:126:12: E721 do not compare types, for exact checks use `is` / `is not`, for instance checks use `isinstance()`
ait/core/cmd.py:413:52: E721 do not compare types, for exact checks use `is` / `is not`, for instance checks use `isinstance()`
ait/core/dmc.py:88:5: F824 `global TICs` is unused: name is never assigned in scope
ait/core/evr.py:37:52: E721 do not compare types, for exact checks use `is` / `is not`, for instance checks use `isinstance()`
ait/core/limits.py:185:52: E721 do not compare types, for exact checks use `is` / `is not`, for instance checks use `isinstance()`
ait/core/notify.py:51:8: E721 do not compare types, for exact checks use `is` / `is not`, for instance checks use `isinstance()`
ait/core/server/server.py:128:32: E721 do not compare types, for exact checks use `is` / `is not`, for instance checks use `isinstance()`
ait/core/table.py:419:52: E721 do not compare types, for exact checks use `is` / `is not`, for instance checks use `isinstance()`
ait/core/tlm.py:342:12: E721 do not compare types, for exact checks use `is` / `is not`, for instance checks use `isinstance()`
ait/core/tlm.py:345:12: E721 do not compare types, for exact checks use `is` / `is not`, for instance checks use `isinstance()`
ait/core/tlm.py:985:52: E721 do not compare types, for exact checks use `is` / `is not`, for instance checks use `isinstance()`
ait/core/util.py:510:5: B042 Exception class with `__init__` should pass all args to `super().__init__()` to work in edge cases of `pickle` and `copy.copy()`. It should also not take any kwargs.
ait/core/util.py:518:5: B042 Exception class with `__init__` should pass all args to `super().__init__()` to work in edge cases of `pickle` and `copy.copy()`. It should also not take any kwargs.

Perhaps update setup.cfg to ignore these warnings (Need further investigation)