Determine whether ckanext-pages is thread-safe

[jeancochrane]

It's possible that the ckanex-pages plugin is not thread-safe. We believe that this is may be the case based on an apparent race condition in two threads spawned by one worker, a race condition that seems to have caused a shared SQLAlchemy connection to enter a degraded state for that worker. For more background, see our investigation into #92 (comment).

Based on discussion in ckan/ckanext-pages#81, we should evaluate if this is true, and if there is any way for us to mitigate the issue in the ODP application.

[rcheetham]

We are archiving this repository as the CKAN instance has been replaced and no new work is planned.