Replace areaMap endpoint

[dinukadesilva]

Currently, using this endpoint only the area mappings of the tally sheet listings are taken care of. Consequently, it has so many redundant data.

I propose, let's make the area get all endpoint to take a list of areaIds and a list of parentAreaIds. So, that based on the tally sheet listing, we could retrieve the required list of mappings only.

I see following tasks in high level.

1. Enable the additional parameters in area get all.
2. Adding a service provider [1]for areas in front end.
3. Replace all the instanced in the frontend where areaMap is used.

[1] https://github.com/ECLK/results-tabulation/tree/master/results-tabulation-ui/src/services

[dinukadesilva]

Let's get the UI also refactored accordingly