NXCALS-3691 Run unit tests on dedicated testing db

#Merge request template @acc-logging-team - please have a look for approval.

STEPS TO GET STARTED WITH ISOLATED JUNIT_TESTS

1. Request a new database from Oracle resources (Service portal) named <mycernusername>_nxcals_junits (ex. gavgitid_nxcals_junits)
2. Once ready, change the db password to be exactly the same with the current nxcals_junits password

You're good to go, conventions, as defined in this MR, will resolve and find your database, based on your CERN username ;)

Closes NXCALS-3691