Fixes a couple of lint errors caught by `npm run lint` in timeline-
overview.js and timeline-viewport.js. Also restructures the test-
details controller to use appropriate `this.` syntax instead of
`$scope.`
In addition, eslint and eslint-config-openstack have been updated,
and a new .eslintrc.json config file has been created to tweak some
specific rules for stackviz.
Change-Id: I9e1fe5121621730eb3efda4b99e9fe182f399aee
093c02d0b9