Retry if instruments hangs on launch.

Addressing several recent failures on Travis e.g. https://travis-ci.org/inkling/Subliminal/jobs/16904080.
Slightly increase the delay after setting the device orientation to ensure that UIDevice updates.

On certain platforms i.e. Travis, iOS 7 occasionally requires a slightly higher delay.
Slightly increase the delay before alert handlers return to ensure that alert delegates receive their callbacks.

On certain platforms i.e. Travis, iOS 7 occasionally requires a slightly higher delay.