An error on the scheduling page does not stop phantom scheduling

[rgerkin]

The error in #190 does not prevent me from clicking "Run Tests" on the scheduling page, which then returns me back to the Test Scores page. However, nothing shows up there (i.e. there is no indication that the test was scheduled and is pending). Presumably the test was never actually scheduled, which makes sense, but in that case the user should not be able to press "Run Tests" and should not be directed back to the Test Scores page as if it was successful.