Fixing the end to end tests

The auto-generated blacklight catalog controller in the spec/internal
app needed to go; Its solr configurations were incorrect for the
curate engine.

Also, I want the application, by default in test, to not raise an
exception but instead render the exception page. This is overridable
at the environment level.

Closes ndlib/planning#84
Merge pull request #50 from ndlib/gh-84-get-end-to-end-spec-running

Fixing the end to end tests