fix(router): fix url path for star segment in path recognizer

[btford]

Supersedes #6514

Url path of star segments should equal the original path.

If you register the route /app/*location and invoke a url like /app/foo/bar
the PathRecognizer should return a url path equal to the invoked url.

Before this patch, everything after foo was ignored, which resulted in a
redirect to /app/foo which was probably not intended (at least in the angular
1.5 component router).

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[mary-poppins]

Merging PR #6976 on behalf of @btford to branch presubmit-btford-pr-6976.

[mary-poppins]

Merging PR #6976 on behalf of @btford to branch presubmit-btford-pr-6976.

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