Update test engine version to 19.03.5

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Author: thaJeztah

Makefile

@@ -42,7 +42,7 @@ integration-test-py3: build-py3
 	docker run -t --rm -v /var/run/docker.sock:/var/run/docker.sock docker-sdk-python3 py.test -v tests/integration/${file}
 
 TEST_API_VERSION ?= 1.35
-TEST_ENGINE_VERSION ?= 18.09.5
+TEST_ENGINE_VERSION ?= 19.03.5
 
 .PHONY: setup-network
 setup-network: