fix: authorize old wills

[gnought]

This is a response to #767, to authorise old wills be published. The client will be null in authorizePublish in this case.

[robertsLando]

LGTM. I think it makes sense to add to docs a notice about broker id, by default it has a random id and this could break the will restore logic

[coveralls]

Pull Request Test Coverage Report for Build 2775964564

• 0 of 6 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.0006%) to 99.824%

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Totals
Change from base Build 2774974517:	0.0006%
Covered Lines:	808
Relevant Lines:	808

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 2775964564

• 6 of 6 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.0006%) to 99.824%

---

Totals
Change from base Build 2774974517:	0.0006%
Covered Lines:	808
Relevant Lines:	808

---

💛 - Coveralls

[gnought]

@robertsLando would be mind to elaborate about the will restore logic you are referring to?

[robertsLando]

@gnought The one we are speaking about here: #756

[gnought]

@gnought The one we are speaking about here: #756

I see. This fix does not relate to the will restore logic. It adds an authorisation logic before aedes publishes the old wills.

[robertsLando]

Yep not related to this was just to mention that :) Merge this if ended