Optimize code

defaults/main.yml

@@ -10,7 +10,6 @@ sd_agent_key: ''
 sd_logging_level: 'info'
 sd_alert_cleanup: no
 sd_force_update: yes
-sd_plugins: []
 sd_groups:
   apache: 'none'
   mysql: 'none'

tasks/serverdensity.yml

@@ -41,8 +41,7 @@
   copy:
     src={{ sd_plugins_files_dir }}/{{ item }}
     dest={{ sd_agent_plugins_dir }}/{{ item }}
-  with_items: '{{ sd_plugins }}'
-  when: sd_plugins|length > 0
+  with_items: '{{ sd_plugins|default([]) }}'
   notify: "ServerDensity | Restart Agent"
 
 - name: "ServerDensity | Configure The Agent"