allow quoted dates in regex in before_index()

[joetsoi]

ckan branch 381-convert-from-extras-quoting allows quotes round
dates which means the regex here needs to allow them as well.

https://github.com/okfn/ckan/tree/381-convert-from-extras-quoting

[seanh]

Is there a bug here that can be reproduced, and this branch tested to see that if fixes the bug?

I'm not sure I understand the change, the regex is for parsing date strings from data publica, so this change would only be needed if datasets harvested from data publica have quotes around their date strings now. Is that what happens?

[amercader]

Note that after ckan/ckan#267 the whole data publica hack is no longer needed as all _date ending fields are handled at index time in core. So basically all your before_index method can go (if you are using latest core release-v2.0)

[joetsoi]

yeah I figured as much, the before_index method actually broke because it was only expecting data publica formats and crashed out on any other see c1d7456