Add the missing option for gloabols.yml

- collectd
- remove the unnecessary space

Change-Id: I98c60d29f50bb105ca52cc0060bfcd2b3701e6db

etc/kolla/globals.yml

 ---
 # You can use this file to override _any_ variable throughout Kolla.
 # Additional options can be found in the
-# 'kolla-ansible/ansible/group_vars/all.yml' file. Default value of all the 
+# 'kolla-ansible/ansible/group_vars/all.yml' file. Default value of all the
 # commented parameters are shown here, To override the default value uncomment
 # the parameter and change its value.
 
@@ -132,6 +132,7 @@ kolla_internal_vip_address: "10.10.10.254"
 #enable_cinder_backend_lvm: "no"
 #enable_cinder_backend_nfs: "no"
 #enable_cloudkitty: "no"
+#enable_collectd: "no"
 #enable_congress: "no"
 #enable_designate: "no"
 #enable_destroy_images: "no"