Resolve dependence on single thread execution.

[heemankv]

Context

There are many test functions that currently require running only 1 test thread and fail on multiple test threads.
E.g :

• test_da_job_process_job_failure_on_impossible_blob_length
• test_da_job_process_job_failure_on_pending_block
• test_da_job_process_job_success

Possible reason for only running on 1 thread :

All these tests use external services like mongodb, localstack which do not support multi thread execution on local.

Consequence :

We have to run all the tests on a single thread, when running all the tests together be it in CI or local.

Goal :

1. We want to either find a way to run these tests in parallel to remove dependence of running on 1 thread.
   OR
2. We want to implement a solution to specify tests that need single thread execution and allow others to utilise parallelism.

Possible Solution for Goal 2 :

Specifying Serial Tests on each tests that requires single thread execution.