Fix inconsistancy in globals.yml

The parameter values in global.yml were inconsist,
for some variable default values are shown while for
others it's not.

From user point of view it is important to know
the default values of the parameters and the globals.yml is
the file where user is supposed to look for config variable,
for sure a user do not want to look kolla/ansible/group_var/all.yml
file just for checking default values. So it is better to show all
default values in global.yml

This patch will solve this issue.

TrivialFix

Change-Id: I991fc5e1d4ed48d106da002a0f18a2b31525a482

etc/kolla/globals.yml

 ---
 # You can use this file to override _any_ variable throughout Kolla.
-# Additional options can be found in the 'kolla/group_vars/all.yml' file.
+# Additional options can be found in the 'kolla/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.
 
 ###################
 # Kolla options
@@ -77,8 +79,8 @@ neutron_external_interface: "eth1"
 ####################
 # To provide encryption and authentication on the kolla_external_vip_interface,
 # TLS can be enabled.  When TLS is enabled, certificates must be provided to
-# allow clients to perform authentication.  The default is TLS disabled.
-#kolla_enable_tls_external: "yes"
+# allow clients to perform authentication.
+#kolla_enable_tls_external: "no"
 #kolla_external_fqdn_cert: "{{ node_config_directory }}/certificates/haproxy.pem"
 
 
@@ -86,16 +88,17 @@ neutron_external_interface: "eth1"
 # OpenStack options
 ####################
 # Use these options to set the various log levels across all OpenStack projects
+# Valid options are [ True, False ]
 #openstack_logging_debug: "False"
 
 # Valid options are [ novnc, spice ]
 #nova_console: "novnc"
 
 # OpenStack services can be enabled or disabled with these options
-#enable_cinder: "yes"
-#enable_heat: "no"
+#enable_cinder: "no"
+#enable_heat: "yes"
 #enable_magnum: "no"
-#enable_swift: "yes"
+#enable_swift: "no"
 
 
 ###################