deployment verification script

[kautukkundan]

What does this pull request do? Explain your changes. (required)

Added hardhat task to verify contracts registered with controller as well as initial parameters set in the contract based on the preset network config

Specific updates (required)

How did you test each of these updates (required)

Does this pull request close any open issues?

Checklist:

• [x] README and other documentation updated
• [x] All tests using yarn test pass

[yondonfu]

Pushed

https://github.com/livepeer/protocol/pull/548/commits/4b48fd07939502b8a1f9d41cf1faf6da597343fa https://github.com/livepeer/protocol/pull/548/commits/3d596efa5735b0ae0015d560d5a4dcae4003e489