load_configuration does not support JSON files with tab whitespace because of ruamel loader

[ghost]

For the switch to YAML in configuration files, we switched to the ruamel.yaml loader, which supports JSON and YAML:

intelmq/intelmq/lib/utils.py

Lines 201 to 216 in cf87d90

	def load_configuration(configuration_filepath: str) -> dict:
	"""
	Load JSON or YAML configuration file.
	Parameters:
	configuration_filepath: Path to file to load.
	Returns:
	config: Parsed configuration
	Raises:
	ValueError: if file not found
	"""
	if os.path.exists(configuration_filepath):
	with open(configuration_filepath, 'r') as fpconfig:
	config = yaml.load(fpconfig)

However, ruamel does not support JSON files with tabs as whitespace, because YAML does not support tabs. As this routine is used to load various JSON files, which can be formatted howsoever the user formatted them, we need to support JSON with tabs.

As a workaround, we could catch this specific exception and fallback to the JSON loader.
Or we use a parameter to the routine like we have it for the write equivalent:

intelmq/intelmq/lib/utils.py

Lines 222 to 224 in cf87d90

	def write_configuration(configuration_filepath: str,
	content: dict, backup: bool = True,
	new=False, useyaml=True) -> Optional[bool]: