Add load_test_model function with importorskip()
Add load_test_model function with importorskip()

Loads model only if it can be imported, i.e. if it's installed as a
package.

explosion/spaCy,aikramer2/spaCy,recognai/spaCy,honnibal/spaCy,honnibal/spaCy,spacy-io/spaCy,spacy-io/spaCy,aikramer2/spaCy,spacy-io/spaCy,spacy-io/spaCy,spacy-io/spaCy,explosion/spaCy,explosion/spaCy,spacy-io/spaCy,explosion/spaCy,recognai/spaCy,aikramer2/spaCy,aikramer2/spaCy,recognai/spaCy,honnibal/spaCy,explosion/spaCy,recognai/spaCy,recognai/spaCy,honnibal/spaCy,aikramer2/spaCy,recognai/spaCy,aikramer2/spaCy,explosion/spaCy