Fix unit tests and enable tests in CI for ai-video

[leszko]

Changes:

• Remove all tests related to deprecated segData.Profiles @yondonfu Please double check we don't need it for video anymore (I've seen your commit here: a2b194e#diff-7157f6a8ee36dc4ada0f69ca25c9b79cbbae048dba0b4dde96270ad400d900eeL499
• Fix unit tests
• Fix lint errors
• Update golangci-lint
• Enable running tests in CI for ai-video

[yondonfu]

Re: removing tests for the deprecated net.SegData.Profiles field.

I think it is fine to remove the tests and to keep the commit.

IIRC the problem I was trying to solve with that commit was that the AI requests would trigger a failure on the O for the call common.BytesToVideoProfile(segData.Profiles) because the B sets the net.SegData.Profiles field to []byte("invalid") (the NetSegData() function is used in server.genSegCreds() in server.prepareAIPayment()).

And IIRC the reason for keeping the logic for parsing the Profiles field was to maintain compatibility with older versions of go-livepeer - a G on an older version of go-livepeer prior to the introduction of the new profile related fields in net.SegData would still be able to speak with an O on a newer version of go-livepeer after the introduction of those fields. But, its been awhile and IMO at some point it makes sense to cleanup this really old deprecated field if no one is running such an old version of go-livepeer.

I would just recommend announcing with plenty of lead time that this will be a breaking change unlikely to affect anyone, but if you are running a old version of go-livepeer for a G you should upgrade to a more recent one that uses the other profile fields of net.SegData.

[rickstaa]

Had some questions but apart from that looks good to me.