Revert "types: Make transaction on report optional

This reverts commit 1f555d9.

I need to wake up. Since v2 API cannot access reports and experimental
is gone this change is completely useless.

pypuppetdb/types.py

@@ -78,8 +78,7 @@ class Report(object):
     :type format\_: :obj:`int`
     :param agent_version: The Puppet agent version.
     :type agent_version: :obj:`string`
-    :param transaction: The UUID of this transaction, or none on API versions\
-            prior to v2.
+    :param transaction: The UUID of this transaction.
     :type transaction: :obj:`string`
 
     :ivar node: The hostname this report originated from.
@@ -96,7 +95,7 @@ class Report(object):
 
     """
     def __init__(self, node, hash_, start, end, received, version,
-                 format_, agent_version, transaction=None):
+                 format_, agent_version, transaction):
 
         self.node = node
         self.hash_ = hash_

tests/test_types.py

@@ -65,7 +65,7 @@ def test_resource():
     assert resource.parameters['mode'] == '0600'
 
 
-def test_report_with_transaction():
+def test_report():
     report = Report('node1.puppet.board', 'hash#', '2013-08-01T09:57:00.000Z',
                     '2013-08-01T10:57:00.000Z', '2013-08-01T10:58:00.000Z',
                     '1351535883', 3, '3.2.1',
@@ -82,22 +82,6 @@ def test_report_with_transaction():
     assert report.transaction == 'af9f16e3-75f6-4f90-acc6-f83d6524a6f3'
 
 
-def test_report_without_transaction():
-    report = Report('node1.puppet.board', 'hash#', '2013-08-01T09:57:00.000Z',
-                    '2013-08-01T10:57:00.000Z', '2013-08-01T10:58:00.000Z',
-                    '1351535883', 3, '3.2.1')
-    assert report.node == 'node1.puppet.board'
-    assert report.hash_ == 'hash#'
-    assert report.start == json_to_datetime('2013-08-01T09:57:00.000Z')
-    assert report.end == json_to_datetime('2013-08-01T10:57:00.000Z')
-    assert report.received == json_to_datetime('2013-08-01T10:58:00.000Z')
-    assert report.version == '1351535883'
-    assert report.format_ == 3
-    assert report.agent_version == '3.2.1'
-    assert report.run_time == report.end - report.start
-    assert report.transaction is None
-
-
 def test_event():
     event = Event('node1.puppet.board', 'failure', '2013-08-01T10:57:00.000Z',
                   'hash#', '/etc/ssh/sshd_config', 'ensure', 'Nothing to say',