Adding a test to check that text can be fetched from the value attribute

Adding a test to expose an issue where waitForSelectorTextChange (which uses ClientUtils.fetchText) should pick up changes in input elements, but isn't currently.

Refer to Issue: https://github.com/n1k0/casperjs/issues/1078
Fixed in PR: https://github.com/n1k0/casperjs/pull/1079