restore the imports

Author: FarahZKhan

tests/test_provenance.py

@@ -25,6 +25,15 @@
 from cwltool.utils import onWindows
 
 from .util import get_data
+import bagit
+import posixpath
+import ntpath
+from six.moves import urllib
+from rdflib import Namespace, URIRef, Graph, Literal
+from rdflib.namespace import RDF,RDFS,SKOS,DCTERMS,FOAF,XSD,DC
+import arcp
+import json
+from hashlib import sha1
 
 # RDF namespaces we'll query for later
 ORE = Namespace("http://www.openarchives.org/ore/terms/")