[Brokernode] When all eth/PRL payment issues are resolved, un-comment out the commented out tests and remove t.skip() calls

[rfornea]

There are some tests in actions/upload_sessions_test.go that don't currently pass or don't always pass. When all eth/prl issues are resolved, uncomment out these tests.

Also remove all the t.Skip() calls in eth_gateway_test.go

[rfornea]

@Astor Do you think you might have some time in the near future to check on the tests that are failing and still have the t.skip() calls?

[Astor]

Removing them and working on cleaning this up.

[Astor]

Ethereum tests are all passing with no skip. I've been now working on the Oyster Pearl tests exclusively, and we have the working simulator and split off the tests for Oyster Pearl to oyster_pearl_test.go to isolate those unit tests.

[rfornea]

@Astor I know you said you've got all these working without the skips. Do you think you could make a PR to check in the changes you've made so far?

[Astor]

Have a working PR, cleaning up the comments and code today to review.

[Astor]

Here is the PR with the updated tests, more notes at the PR -> #498