feat: Add Column Badge API

[alldoami]

Summary of Changes

Added Column Badge API that addresses this issue: amundsen-io/amundsen#944

Tests

Tested exactly how we're testing Table Badges right now.

Documentation

amundsen-io/amundsen#962

CheckList

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[codecov-io]

Codecov Report

Merging #273 (fd812db) into master (2752492) will increase coverage by 3.54%.
The diff coverage is 73.34%.

@@            Coverage Diff             @@
##           master     #273      +/-   ##
==========================================
+ Coverage   74.10%   77.64%   +3.54%     
==========================================
  Files          25       27       +2     
  Lines        1255     1387     +132     
  Branches      136      163      +27     
==========================================
+ Hits          930     1077     +147     
+ Misses        297      263      -34     
- Partials       28       47      +19     

Impacted Files	Coverage Δ
metadata_service/api/popular_tables.py	100.00% <ø> (ø)
metadata_service/api/system.py	66.66% <ø> (ø)
metadata_service/api/user.py	100.00% <ø> (ø)
metadata_service/proxy/statsd_utilities.py	81.25% <ø> (ø)
metadata_service/util.py	100.00% <ø> (ø)
metadata_service/proxy/shared.py	28.57% <28.57%> (ø)
metadata_service/api/badge.py	61.29% <61.29%> (ø)
metadata_service/proxy/neo4j_proxy.py	71.55% <61.53%> (-3.45%)	⬇️
metadata_service/api/column.py	72.22% <64.28%> (-27.78%)	⬇️
metadata_service/proxy/base_proxy.py	67.07% <73.33%> (-0.07%)	⬇️
... and 17 more

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[alldoami]

Would love to get Dmitriy's code to get merged fixing amundsen-io/amundsen#939 before merging this.

[dkunitsk]

amundsen-io/amundsen#939 should be fixed now (by amundsen-io/amundsen#951)

[alldoami]

Thanks @dkunitsk! Would love to get this in the new release then 😄

[dorianj]

Thanks for the contribution!

[dorianj]

Nice!

[feng-tao]

thanks @alldoami

[alldoami]

Thanks @feng-tao! Should we merge amundsen-io/amundsen#962 too? I fixed the merge history 😄