Removing duplicate variable "parsed_args.config_file"

In test_run.py, there is a variable "parsed_args.config_file"
which is used twice during it's assignment.
Second time assignment is overwriting the assignment of first time.

So this patch set will remove the un-necessary duplicity.

Change-Id: I03dfb6990984a165d49ed9742f20e243370dc765
Partially-Implements: blueprint tempest-cli-unit-test-coverage
1 file changed