I'm getting linting errors for the
`resources/dist/tests.mobilefrontend.js` file whenever I run `npm run
test` now due in part to the --no-ignore option we use to run the
command. This commit offers an alternative so that that file is ignored
when linting es5.

Change-Id: I079bc14816da0f063e71bfa81fda943e8a8985f9