fix(frameworks) specFilter should return false if spec not in filter

[dsteinbach]

We override jasmine.env.specFilter function in protractor but it will always returns true while jasmine's implementation returns true or false:

this.env.specFilter = function(spec) {
  return specFilter.matches(spec.getFullName());
};

This is to resolve:
#3952

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[googlebot]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

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[dsteinbach]

I signed it!

[googlebot]

CLAs look good, thanks!

[googlebot]

CLAs look good, thanks!

[vikerman]

Hi - Can you add a test for this?