Moving samples/ out of the root into test/

Since samples/ is used for v2 testing, it fits better into the existing test/ structure.

test/samples/with_subelements.yml

@@ -0,0 +1,18 @@
+- hosts: localhost
+  connection: local
+  gather_facts: no
+  vars:
+    users:
+      - name: alice
+        authorized:
+          - /tmp/alice/onekey.pub
+          - /tmp/alice/twokey.pub
+      - name: bob
+        authorized:
+          - /tmp/bob/id_rsa.pub
+
+  tasks:
+  - debug: msg="user={{ item.0.name }} key='{{ item.1 }}'"
+    with_subelements:
+    - users
+    - authorized