Use yaml syntax instead of key=value syntax consistently

fixes #62

roles/matrix-server/tasks/register_user.yml

@@ -1,24 +1,31 @@
 ---
 
 - name: Fail if playbook called incorrectly
-  fail: msg="The `username` variable needs to be provided to this playbook, via --extra-vars"
+  fail:
+    msg: "The `username` variable needs to be provided to this playbook, via --extra-vars"
   when: "username is not defined or username == '<your-username>'"
 
 - name: Fail if playbook called incorrectly
-  fail: msg="The `password` variable needs to be provided to this playbook, via --extra-vars"
+  fail:
+    msg: "The `password` variable needs to be provided to this playbook, via --extra-vars"
   when: "password is not defined or password == '<your-password>'"
 
 - name: Fail if playbook called incorrectly
-  fail: msg="The `admin` variable needs to be provided to this playbook, via --extra-vars"
+  fail:
+    msg: "The `admin` variable needs to be provided to this playbook, via --extra-vars"
   when: "admin is not defined or admin not in ['yes', 'no']"
 
 - name: Ensure matrix-synapse is started
-  service: name=matrix-synapse state=started daemon_reload=yes
+  service:
+    name: matrix-synapse
+    state: started
+    daemon_reload: yes
   register: start_result
 
 - name: Wait a while, so that Matrix Synapse can manage to start
-  pause: seconds=7
+  pause:
+    seconds: 7
   when: start_result.changed
 
 - name: Register user
-  shell: "/usr/local/bin/matrix-synapse-register-user {{ username }} {{ password }} {{ '1' if admin == 'yes' else '0' }}"
+  shell: "/usr/local/bin/matrix-synapse-register-user {{ username }} {{ password }} {{ '1' if admin == 'yes' else '0' }}"