Replaced check with python3-friendly version

Author: ciaran-blewitt-webjet

bigquery/schema_builder.py

@@ -126,7 +126,7 @@ def bigquery_type(o, timestamp_parser=default_timestamp_parser):
  """
 
  t = type(o)
- if t == int or t == long:
+ if isinstance(t, six.integertype):
  return "integer"
  elif (t == six.binary_type and six.PY2) or t == six.text_type:
  if timestamp_parser and timestamp_parser(o):