Add support for tolerations in all deployments and pods

[LaloLoop]

Closes In the Helm chart toleration missed #89

[CLAassistant]

All committers have signed the CLA.

[AlexGidman]

@LaloLoop were there any issues with having this merged? This is something we're looking at for an enterprise deployment, we really don't want to have to fork the helm chart!

[LaloLoop]

Hi @AlexGidman , we have yet to get any feedback from the RocketChat team.
Hello @debdutdeb, @geekgonecrazy . Sorry to tag you directly, I'm adding you as I found your usernames in recent PR reviews/merges. Any chance of getting a review here?
Thanks!

[debdutdeb]

Could this key be per-deployment and not common for all?

Maybe there could be a global key that is common, then per-deployment to override each. I see the value in not having to repeat for all deployments.

[AlexGidman]

Could this key be per-deployment and not common for all?

Maybe there could be a global key that is common, then per-deployment to override each. I see the value in not having to repeat for all deployments.

I'll admit that I don't know all situations where tolerations may be applicable; in our case, the ability to apply tolerations 'globally' is a lot cleaner and sufficient for our purposes.