add missing key

.vsts-ci.yml

@@ -39,6 +39,7 @@ phases:
         export CLIENT_ID=$(CLIENT_ID)
         export CREDENTIAL=$(CREDENTIAL)
         export ID_RSA=$(ID_RSA)
+        export ID_RSA_PUB=$(ID_RSA_PUB)
         export STORAGE_ACCOUNT_RESOURCE_ID=$(STORAGE_ACCOUNT_RESOURCE_ID)
         export TENANT_ID=$(TENANT_ID)
         pytest --numprocesses=75 tests/integration_tests