enzyme shallow tests

[atherdon]

Calendar Component → just render

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AddMealModal Component
click on button - stimulate event (make it similar to my version, later we'll make it as working test)
and rename this component and check if something not broke. because we have a different file names and component names - it's confusing.

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SheduleRender
check if component Col has a sm=2

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Timeline component
check if it have timedHeight
and check if ListGroup have 8 elements inside it.

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WorkShedule component
have class header
have container or just count of elements =2