AACT-548: Make the BackgroundJob tests pass

[Javier-Jimenez-18]

Fixed the following two FAILs when running the RSpec tests using the GitHub workflow file build-and-test-not-master.yml:

rspec ./spec/models/background_job/db_query_spec.rb:9 # BackgroundJob::DbQuery#process should complete successfully when there is a valid SQL query

rspec ./spec/models/background_job/db_query_spec.rb:17 # BackgroundJob::DbQuery#process should update the status to "error" for the user when the SQL query is invalid

Including these 2 BackgroundJob failures, there is a total of 85 failures:

I de-bugged the code by adding print statements to find what caused the errors:

I modified the GitHub workflow file to add a temporary directory and file to store the output csv when the BackgroundJob::DbQuery#process method is called:

The two tests PASS. Now, there is a total of 83 non-BackgroundJob failures:

[Javier-Jimenez-18]

Removed creating a temporary "tmp" directory in the GitHub workflow file build-and-test-not-master.yml .

Added code to create a temporary "tmp" directory in the BackgroundJob::DbQuery#process method.

The 2 RSpec background_job tests still PASS: