CLA Checker: Show time of attempted verification

[gibson042]

For technical reasons, we don't automatically recheck pull requests when a contributor signs the CLA. But pages/CLA/status.md doesn't provide enough information on its own to detect post-failure resolution, because it lacks the invocation time.

We should add text to the effect of "The following authors didn't have appropriate CLA signatures as of [datetime]", and also instructions to reactivate the checker by pushing a new commit to each affected pull request (perhaps suggesting git commit --allow-empty -m '[CLA]: Recheck').

[cvrebert]

Have you considered having the bot listen for PR comments and having some magic comment force a CLA re-check?

[arschmitz]

@gibson042 @cvrebert The only reason we don't currently re-check is just that it has not been implemented, the cla checker is very new. There are 2 open issues for this jquery/jquery-license#2 to implement the ability to recheck a PR, and jquery/jquery-license#6 Which is to implement auto re-checks ( and also includes discussion of re-checking based on comments )

--allow-empty would work just not sure we want to recommend that? @scottgonzalez thoughts?

[scottgonzalez]

Moved to jquery/jquery-license#30 since that's where we've been tracking all of the CLA checker changes.

I'd rather see someone just implement jquery/jquery-license#6 instead of suggesting empty commits.