Fix typo in all.yml

Change-Id: Ifff1d1840c3e790afbe6993d0a9c6e201d5f0ba4

ansible/group_vars/all.yml

@@ -59,7 +59,7 @@ api_interface_address:  "{{ hostvars[inventory_hostname]['ansible_' + api_interf
 ################
 # Chrony options
 ################
-# a list contains ntp servers
+# A list contains ntp servers
 external_ntp_servers:
   - 0.pool.ntp.org
   - 1.pool.ntp.org
@@ -88,7 +88,7 @@ docker_restart_policy: "unless-stopped"
 # '0' means unlimited retries
 docker_restart_policy_retry: "10"
 
-# Common options used throughout docker
+# Common options used throughout Docker
 docker_common_options:
     auth_email: "{{ docker_registry_email }}"
     auth_password: "{{ docker_registry_password }}"
@@ -518,7 +518,7 @@ ceph_osd_mount_options: "defaults,noatime"
 # Valid options are [ erasure, replicated ]
 ceph_pool_type: "replicated"
 
-# Integrate ceph rados object gateway with openstack keystone
+# Integrate Ceph Rados Object Gateway with OpenStack keystone
 enable_ceph_rgw_keystone: "no"
 
 ceph_cinder_pool_name: "volumes"