Bug when there's a single map in vector of import config dataset tree for card many child attribute

[benkamphaus]

unify/test/resources/systems/candel/parse-config-examples/template-config.yaml

Lines 75 to 87 in 56c9e23

	# TODO: Unify should treat an object or an array here equivalently, so we should probably
	# modify JSON spec at some point. But on the flip side, there appears to be a bug in
	# config parsing when this is an array with one object instead of an isolated object, so
	# we should wait to address that. Removed out of PR #53 and into a new issue.
	therapies:
	unify/input-csv-file: "processed/rizvi-therapies.txt"
	treatment-regimen: "regimen"
	line: "line"
	unify/constants:
	order: 1
	unify/reverse:
	unify/rev-variable: "subject.id"
	unify/rev-attr: ":subject/therapies"

In this case, if there's a vector with one map, the Unify keys are not properly handled in the directive and Unify throws when it can't find Unify processing syntax in the file.