feat: check if period is submitted before submitting fast exit

[troggy]

• [x] increased lambda timeout to 2 minutes. temporary workaround to allow processing a few exits at a time. Proper fix would be not to wait on txs being mined and process exits in batches
• [x] before submitting a fast exit to the exitHandler, we check the bridge if it has the period from the proof. This way we prevent failed txs — since CAS we cannot rely on block height for period expectancy anymore.