unit tests failures with 4store

[alexskr]

Unit tests are passing with AllegroGraph backend but fail with 4store:

TestAnnotator#test_annotate = 0.26 s = F
TestAnnotator#test_annotate_minsize_term = 0.27 s = F
 ...

Finished tests in 17.753188s, 0.6759 tests/s, 696.2693 assertions/s.

  1) Failure:
TestAnnotator#test_annotate [/srv/ontoportal/ncbo_annotator/test/test_annotator.rb:259]:
Failed assertion, no message given.

  2) Failure:
TestAnnotator#test_annotate_minsize_term [/srv/ontoportal/ncbo_annotator/test/test_annotator.rb:380]:
Failed assertion, no message given.

12 tests, 12361 assertions, 2 failures, 0 errors, 1 skips

[alexskr]

failure is most likely related to
ncbo/ontologies_linked_data@0dd23bf#diff-0aa1d7a610a8911060e61820e6fbbf779e4893614cea4e20f756733327b8dbc4R676