Check variable pre-population scenario where nested components: such as in a container

[StephenOTT]

If you have a container with component, how do you do pre-population? The pre-populated variables are in parent scope. When cycling over each component, we need to detect what the path of the component is in the submission object, and then create that path in the submission object with the pre-population variable

[StephenOTT]

Review this line: https://github.com/StephenOTT/camunda-formio-plugin/blob/master/common/forms/formio.html#L223

[StephenOTT]

ref: https://github.com/formio/formio.js/issues/3470