Patch to be less eager to generate PDFs

[payten]

If EAD XML mtime matches PDF mtime, assume they are a pair and we don't need to generate another PDF (previously the XML mtime had to be less than the PDF mtime).

I'm not sure if this is the fix!! But it's the only way I can see how this case might happen:

https://www.pivotaltracker.com/file_attachments/69631749/download?inline=true

What do you guys think?

[jambun]

wow - could this really be it?

[payten]

Maybe :/ The thing is, if a record's mtime changes but the record stays the same, the XML will always update as there's a string in the EAD <creation>This finding aid was produced using ArchivesSpace on <date>2016-10-03 15:21:52 +1100</date>.</creation>. I couldn't see other ways the PDF could be exported and pushed up without the EAD XML changing.

[payten]

This is not the fix! I think we need to see the logs to get a better picture of things.