* add websocket commands to retrieve and set config parameters for a node
* move set_config_parameter into generic function and refactor service and WS API
* add payload to return to make service call behave the same way it did before
* create response class
* update error message to pass tests
* move things a bit to reduce LOC
* add tests
* handle logging errors better and make new response class more generic to prepare for lock user code work
* remove unused function parameter
* invert check
* add additional error checking
* refactor a bit to remove repeat code
* revert log msg change
* one more refactor to create generic get_config_parameters function
* change if logic for consistency
* fix test
* add support to provide bool value in set_config_parameter service call
* standardize parameter names on service call
* add test coverage
* fix tests and message sending
* remove unnecessary logging import
* fix one test to get missing coverage
* update per martin and kpines reviews
* remove false assertion
* string line length
* add support for Decimal config param, remove node instance ID as input, and move helper functions to node.py
* cast Decimal appropriately
* revert change to support Decimal for config params since they are not supported as a config param type
* revert to using error arguments to make next PR for WS lock commands easier
* switch to class method and add guard for list Value not being a number
* update logic to use new openzwavemqtt util methods
* add support for bitsets
* use parent exception class
* bump openzwavemqtt version, remove node.py from .coveragerc and put file references in the right place
* add comment
* improve config validation
* remove bitset support from config validation
* re-add bitset support with some additional tests
* move send_result out of try block
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