Updates scripts_controller_test to use keyword arguments.

[ashercodeorg]

Resolves the deprecation warning, removing spurious output from tests (that obscures failures).

DEPRECATION WARNING: Using positional arguments in functional tests has been deprecated,
in favor of keyword arguments, and will be removed in Rails 5.1.

Output after fix (sans deprecations warnings).

$ bundle exec ruby -Itest test/controllers/scripts_controller_test.rb 
Ignoring db/schema_cache.dump because it has expired. The current schema version is 20170124145919, but the one in the cache is 20170117185757.
Started with run options --seed 17675

  32/32: [=============================================================================================================================================================] 100% Time: 00:01:48, Time: 00:01:48

Finished in 108.45993s
32 tests, 57 assertions, 0 failures, 0 errors, 0 skips

[wjordan]

LGTM (assuming the CI tests continue to pass, on this and future PRs of this sort) 👍