Add cloud init tests for alibaba images.

usr/share/lib/img_proof/tests/SLES/Alibaba/test_sles_alibaba.yaml

@@ -0,0 +1,2 @@
+tests:
+  - test_sles_alibaba_services

usr/share/lib/img_proof/tests/SLES/Alibaba/test_sles_alibaba_services.py

@@ -0,0 +1,18 @@
+import pytest
+
+
+@pytest.mark.parametrize('name', [
+    ('cloud-init-local'),
+    ('cloud-init'),
+    ('cloud-config'),
+    ('cloud-final')
+])
+def test_sles_alibaba_one_shot_services(check_service, host, name):
+    assert check_service(name, running=None)
+
+    if host.exists('systemctl'):
+        # No clear way to check a service exited successfully using sysvinit
+        output = host.run(
+            "systemctl show -p Result {0} | sed 's/Result=//g'".format(name)
+        )
+        assert output.stdout.strip() == 'success'