Add an example rule fixture for rule with unicode name which can be used

by end to end tests.

contrib/examples/rules/sample_rule_with_webhook_unicode_name.yaml

@@ -0,0 +1,20 @@
+---
+    name: "sample_rule_with_webhook_你好"
+    pack: "examples"
+    description: "Sample rule dumping webhook payload to a file. 你好吗"
+    enabled: true
+
+    trigger:
+        type: "core.st2.webhook"
+        parameters:
+            url: "unicode"
+
+    criteria:
+        trigger.body.name:
+            pattern: "st2"
+            type: "equals"
+
+    action:
+        ref: "core.local"
+        parameters:
+            cmd: "echo \"{{trigger.body}}\" >> ~/st2.webhook_sample.out ; sync"