Fix the Celery tasks and serializer

[rgreinho]

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Code cleanup / Refactoring

Description

The default JSON serializer is not able to serialize complex objects like dates or dataclasses. This patch leverage json-tricks to serialize celery data instead of the python json serializer.

• Fixes the Makefile
• Fixes the merge BusinessInfo function
• Change the place view from a GET to a POST
• Fixes the Celery tasks and their unit tests
• Uses responses for mocking HTTP requests

Motivation and Context

Make Celery work again with python 3.7 (and correctly!)

How Has This Been Tested?

Checklist:

• [] I have updated the documentation accordingly
• [X] I have written unit tests

[codecov-io]

Codecov Report

Merging #64 into master will increase coverage by 0.44%. The diff coverage is 80%.

@@            Coverage Diff             @@
##           master      #64      +/-   ##
==========================================
+ Coverage   97.89%   98.34%   +0.44%     
==========================================
  Files           6        6              
  Lines         238      241       +3     
==========================================
+ Hits          233      237       +4     
+ Misses          5        4       -1

Impacted Files	Coverage Δ
api/apps/api/collectors/generic.py	100% <100%> (ø)	:arrow_up:
api/apps/api/collectors/base.py	100% <100%> (ø)	:arrow_up:
api/apps/api/collectors/yelp.py	100% <100%> (ø)	:arrow_up:
api/celery/tasks.py	87.5% <60%> (+2.65%)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 610db65...5e8c57d. Read the comment docs.