TODO in Lotus: fixes in ETH deploy test

[maciejwitowski]

• The contract installation and invocation can be lifted into utility methods URL
• We can either skip the assertion if the msg has already landed, or pause mining between the embryo creation and this assertion URL
• The right time to exit this loop isn't after 20 iterations, but when StateWaitMsg returns URL

[maciejwitowski]

@raulk I took these tests from TODO::FVMs in Lotus: do we absolutely need to land any of these in C.3?

[Stebalien]

@maciejwitowski what's the status here?

[maciejwitowski]

I'd say these itests improvements aren't priority now.