hs-v3: Relax severity of a log message when decoding descriptors.

[asn-d6]

Make it LOG_PROTOCOL_WARN and also add the expiration timestamp in there to ease debugging in the future.

[coveralls]

Pull Request Test Coverage Report for Build 8572

• 4 of 4 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.0009%) to 63.6%

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Totals
Change from base Build 8565:	0.0009%
Covered Lines:	50216
Relevant Lines:	78956

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💛 - Coveralls