Turns out we can access the private cloud definitions in old msrestazure version, so revert the dependency update

requirements.txt

@@ -1,11 +1,11 @@
 pathlib==1.0.1
 futures==3.1.1
-msrestazure==0.5.0
-azure-common==1.1.16
-azure-mgmt-batch==5.0.1
-azure-mgmt-storage==3.0.0
-azure-mgmt-resource==2.0.0
-azure-batch==5.1.1
-azure-storage==0.36.0
-azure-batch-extensions==4.0.2
+msrestazure==0.4.16
+azure-common==1.1.8
+azure-mgmt-batch==4.0.0
+azure-mgmt-storage==1.0.0
+azure-mgmt-resource==1.2.2
+azure-batch==4.0.0
+azure-storage==0.32.0
+azure-batch-extensions==1.0.1
 mock==2.0.0