fixed wrong gammu config dest

roles/matrix-sms-bridge/tasks/setup_install.yml

@@ -53,7 +53,7 @@
 
 - name: Ensure matrix-sms-bridge gammu-smsdrc installed
   copy:
-    content: "{{ matrix_sms_bridge_registration }}"
+    content: "{{ matrix_sms_bridge_gammu_configuration }}"
     dest: "{{ matrix_sms_bridge_config_path }}/gammu-smsdrc"
     mode: 0644
     owner: "{{ matrix_user_username }}"