fix casing on TestResultsClient import

Author: tedchamb

azure-devops/azure/devops/v5_1/test_results/__init__.py

@@ -7,7 +7,7 @@
 # --------------------------------------------------------------------------------------------
 
 from .models import *
-from .test_results_client import testResultsClient
+from .test_results_client import TestResultsClient
 
 __all__ = [
     'AggregatedDataForResultTrend',
@@ -101,5 +101,5 @@
     'TestToWorkItemLinks',
     'WorkItemReference',
     'WorkItemToTestLinks',
-    'testResultsClient'
+    'TestResultsClient'
 ]