Fix oops_spec.

Somehow, under rspec the oops response is read different than under
minitest. There are two additional results under rspec. One thing I
found is that double quotation marks in the response body in rspec are
`\"` while they are `“` in minitest.
Move ontology_search_test to rspec.
Restrict ontologies routing spec file to 80 chars.
Move ontologies_controller_test to rspec.

Also reword 'describe' to 'context' where appropriate.
Move oops_request_controller_test to rspec.
Use one-liner before { ... } where possible.
Omit explicit `FactoryGirl.` on create and build.
Describe examples.
Allow WebMock net connect in rspec.
Use proper mock for raising.
Stub oops requests to read fixture files

The oops requests actually needed a working internet connection.
Otherwise they produced an error because of a missing socket. I recorded
the response to fixture files. However, I'm not sure the spec is still
testing what it's supposed to test.