Fixing a flaky integration test for azure

One the the integration tests, which validates that /getlocation call for same file id should fail was flaky for azure as it depended on environment set-up. The current logic expects a certain file id to be present in the system while running the ITs, which might not be the case with every environment.

Fixing the IT by adding logic to create the file in the test itself.

cc: @sabarishk