Fix The "Required IF" validation doesn't works in Loop/Record List [FOUR-4132]

[caleeli]

Fixes: https://processmaker.atlassian.net/browse/FOUR-4132
Ticket: http://tickets.pm4overflow.com/tickets/1122

This PR based on #1089 includes:

• Get the validation rules data context including reference to _parent
• Add test using validations in Loops and using reference to _parent

[josechirivella]

the get from lodash has a default value if the conditional is not valid or the value is not present.
Docs: https://lodash.com/docs/4.17.15#get

Suggested change

	const firstRow = (get(this.data, this.element.config.name) || [{}])[0];
	const firstRow = get(this.data, this.element.config.name, [{}][0]);

[caleeli]

Thanks for the suggestion, but I use || [{}] to cover the case in which get(this.data, this.element.config.name) is defined but is null