Remove xsd:long usage

References:
* [AC-183] Apply minimal CASE-Utilities-Python updates to use CASE 0.4.0
  and UCO 0.6.0
* [UCO OC-19] (CP-24) UCO might not need xsd:long

Signed-off-by: Alex Nelson <alexander.nelson@nist.gov>

Author: ajnelson-nist

case_utils/case_file/__init__.py

@@ -87,7 +87,7 @@ def create_file_node(graph, filepath, node_iri=None, node_prefix=DEFAULT_PREFIX,
     graph.add((
       n_file_facet,
       NS_UCO_OBSERVABLE.sizeInBytes,
-      rdflib.Literal(file_stat.st_size, datatype=NS_XSD.long)
+      rdflib.Literal(int(file_stat.st_size))
     ))
     graph.add((
       n_file,
@@ -174,7 +174,7 @@ def create_file_node(graph, filepath, node_iri=None, node_prefix=DEFAULT_PREFIX,
         graph.add((
           n_contentdata_facet,
           NS_UCO_OBSERVABLE.sizeInBytes,
-          rdflib.Literal(successful_hashdict["filesize"], datatype=NS_XSD.long)
+          rdflib.Literal(successful_hashdict["filesize"])
         ))
 
         # Add confirmed hashes into graph.