support/testing: add python-pyyaml tests

Add a simple test case to check the basic usage, storing a dict into a
file and then retrieving the dict from the file.

Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

support/testing/tests/package/sample_python_pyyaml_enc.py

@@ -0,0 +1,14 @@
+import yaml
+
+data = {
+    "name": "python-pyyaml",
+    "versions": ["1", "2"],
+    "group": {
+        "is_a_package": True,
+        "value": 42
+    }
+}
+serialized = yaml.dump(data, default_flow_style=False)
+print(serialized)
+with open("/tmp/data.yml", "w") as f:
+    f.write(serialized)