Version lock requirements file (#641)

test/requirements.txt

@@ -1,9 +1,9 @@
-azure.cosmosdb.table
-azure.mgmt.network
-azure.mgmt.resource
-azure.mgmt.subscription
-azure.mgmt.storage
-fabric
-pytest
-scp
-sshtunnel
+azure.cosmosdb.table==1.0.5
+azure.mgmt.network==3.0.0
+azure.mgmt.resource==2.1.0
+azure.mgmt.subscription==0.4.1
+azure.mgmt.storage==3.3.0
+fabric==2.4.0
+pytest==4.6.3
+scp==0.13.2
+sshtunnel==0.1.4