Negated "text" and "value" assertions are always wating for defaultWaitTime

[vgrigoruk]

These lines are always executed for defaultWaitTime

expect('#foo').to.not.have.text('bar')
expect('#foo').to.not.have.value('bar')

Because of these lines:
https://github.com/marcodejongh/chai-webdriverio/blob/master/src/assertions/value.js#L29
https://github.com/marcodejongh/chai-webdriverio/blob/master/src/assertions/text.js#L30