Add example test case in python

test/integration_tests/python/test_gears.py

+import json
+import logging
+
+log = logging.getLogger(__name__)
+sh = logging.StreamHandler()
+log.addHandler(sh)
+
+
+def test_gear_add(as_admin):
+    r = as_admin.post('/gears/test-case-gear', json={
+        "category" : "converter",
+        "gear" : {
+            "inputs" : {
+                "wat" : {
+                    "base" : "file",
+                    "type" : {
+                        "enum" : [
+                            "wat"
+                        ]
+                    }
+                }
+            },
+            "maintainer" : "Example",
+            "description" : "Example",
+            "license" : "BSD-2-Clause",
+            "author" : "Example",
+            "url" : "https://example.example",
+            "label" : "wat",
+            "flywheel" : "0",
+            "source" : "https://example.example",
+            "version" : "0.0.1",
+            "config" : {},
+            "name" : "test-case-gear"
+        },
+        "exchange" : {
+            "git-commit" : "aex",
+            "rootfs-hash" : "sha384:oy",
+            "rootfs-url" : "https://example.example"
+        }
+    })
+    assert r.ok