Reduces number of calls to injectDefaultSchema

[flovilmart]

injectDefaultSchema is called for every single classes in the DB at each load of the schema, which can be very expensive and plain stupid as each request usually only affect 1 class:

x	with fix	without	reduction
number of calls	85806	372653	4x

[codecov]

Codecov Report

Merging #5107 into master will decrease coverage by 0.04%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #5107      +/-   ##
==========================================
- Coverage   93.73%   93.69%   -0.05%     
==========================================
  Files         123      123              
  Lines        8879     8884       +5     
==========================================
+ Hits         8323     8324       +1     
- Misses        556      560       +4

Impacted Files	Coverage Δ
src/Controllers/DatabaseController.js	94.73% <100%> (ø)	⬆️
src/Controllers/SchemaController.js	96.32% <100%> (+0.04%)	⬆️
src/Adapters/Auth/httpsRequest.js	95.23% <0%> (-4.77%)	⬇️
src/RestWrite.js	92.96% <0%> (-0.38%)	⬇️
...dapters/Storage/Postgres/PostgresStorageAdapter.js	97.08% <0%> (-0.09%)	⬇️

---

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 7fe4030...5b9c521. Read the comment docs.