fix(pillar): `tofs` must not be under `mine_functions`

The debug output of test jobs don't show the use of TOFS as it should
and the pillar.example show that `tofs` is under `mine_functions`
instead of `openssh`.

* pillar.example: move `tofs` under `openssh`.

* test/salt/pillar/default.sls: ditoo.

pillar.example

   #     salt://files/ssh/moduli.hash
   # These will be automatically referenced to by the ssh_moduli state.
 
-# Required for openssh.known_hosts
-mine_functions:
-  public_ssh_host_keys:
-    mine_function: cmd.run
-    cmd: cat /etc/ssh/ssh_host_*_key.pub
-    python_shell: true
-  public_ssh_hostname:
-    mine_function: grains.get
-    key: id
-
   tofs:
     # The files_switch key serves as a selector for alternative
     # directories under the formula files directory. See TOFS pattern
         - alt_ssh_config
       sshd_banner:
         - fire_banner
+
+# Required for openssh.known_hosts
+mine_functions:
+  public_ssh_host_keys:
+    mine_function: cmd.run
+    cmd: cat /etc/ssh/ssh_host_*_key.pub
+    python_shell: true
+  public_ssh_hostname:
+    mine_function: grains.get
+    key: id

test/salt/pillar/default.sls

   #     salt://files/ssh/moduli.hash
   # These will be automatically referenced to by the ssh_moduli state.
 
-# Required for openssh.known_hosts
-mine_functions:
-  public_ssh_host_keys:
-    mine_function: cmd.run
-    cmd: cat /etc/ssh/ssh_host_*_key.pub
-    python_shell: true
-  public_ssh_hostname:
-    mine_function: grains.get
-    key: id
-
   tofs:
     # The files_switch key serves as a selector for alternative
     # directories under the formula files directory. See TOFS pattern
         - alt_ssh_config
       sshd_banner:
         - fire_banner
+
+# Required for openssh.known_hosts
+mine_functions:
+  public_ssh_host_keys:
+    mine_function: cmd.run
+    cmd: cat /etc/ssh/ssh_host_*_key.pub
+    python_shell: true
+  public_ssh_hostname:
+    mine_function: grains.get
+    key: id