Implement timeouts in Execute function

[gulavanir]

Currently timeout for Execute has to be externally implemented while calling Execute. Add an ability to pass a context to implement this out of the box. I would be happy to raise a PR

[bwinter]

Hey @gulavanir,

Apologies for the delay, this client has had limited support the last couple of years. We are trying to put a little more focus on it currently. If you are still able to submit a PR I would be happy to review it for an eventual merge.

Thanks!