spec: reset spec timeout
spec: reset spec timeout

related to a change in 652a101faa5 that had to bump
SPEC_TIME_LIMIT_TARGET to get specs passing on jenkins,
this patchset reverts that timeout change.

Change-Id: Idc23afce820c6a1b9b3d261fe6bdb387db85b61e
Reviewed-on: https://gerrit.instructure.com/126928
Reviewed-by: Shahbaz Javeed <6692d7be3fa215e5483a121d6fb314def6049877@instructure.com>
Tested-by: Jenkins
Product-Review: Derek Bender <d24d8a7ee520e34b1cec38800225d9f36b552df7@instructure.com>
QA-Review: Derek Bender <d24d8a7ee520e34b1cec38800225d9f36b552df7@instructure.com>

djbender/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,venturehive/canvas-lms