Fix tests

Author: AnatoliB

tests/models/test_DurableOrchestrationContext.py

@@ -101,18 +101,10 @@ def test_get_input_json_str():
 
     assert 'Seattle' == result['city']
 
-def test_version_equals_version_from_first_execution_started_event():
+def test_version_equals_version_from_execution_started_event():
     builder = ContextBuilder('test_function_context')
     builder.history_events = []
     builder.add_orchestrator_started_event()
     builder.add_execution_started_event(name="TestOrchestrator", version="1.0")
-    builder.add_execution_started_event(name="TestOrchestrator", version="2.0")
     context = DurableOrchestrationContext.from_json(builder.to_json_string())
     assert context.version == "1.0"
-
-def test_version_is_none_if_no_execution_started_event():
-    builder = ContextBuilder('test_function_context')
-    builder.history_events = []
-    builder.add_orchestrator_started_event()
-    context = DurableOrchestrationContext.from_json(builder.to_json_string())
-    assert context.version is None