Test and document quota manager behavior

[anishasthana]

Test out the behavior of quota managemenr in a mix of Kubernetes quota + MCAD quota scenarios
Also document the current code flows, and overall architecture of quota management.
Suggest improvements/standardizations if possible.

[anishasthana]

@asm582 can you take a look at this? @KPostOffice please post/link your PRs once ready!

[KPostOffice]

#393