fix API to actually get submissions on API call
fix API to actually get submissions on API call

jackzhao-mj/ok,jordonwii/ok,jordonwii/ok,jackzhao-mj/ok,Cal-CS-61A-Staff/ok,jordonwii/ok,jackzhao-mj/ok,Cal-CS-61A-Staff/ok,jordonwii/ok,jackzhao-mj/ok,Cal-CS-61A-Staff/ok,Cal-CS-61A-Staff/ok,Cal-CS-61A-Staff/ok