Observer go routine issues / upgrade p2p stack needed

[ylembachar]

[ylembachar]

@blockchainluffy could you please add some context on the issues you encountered here so we keep track of them? Thank you!

[blockchainluffy]

the issue is the same we encountered for keyper, where it does not shut down gracefully because of p2p go routine stuck. We are using same p2p implementation in observer, so it needs to be updated with latest version from keyper (rolling-shutter)