applist DVT hangs when run in quick successions

[Delta456]

As first noticed by @navin772 in #103, ApplicationListing from DVT instrument hangs when running in quick successions.

This can replicated by just running:

npm run build
npm run test:dvt:applist  
npm run test:dvt:applist  
npm run test:dvt:applist  
npm run test:dvt:applist

This needs to be taken care of after we are done implementing rest of the services.