Update Liberty related documentation throughout roles

Change-Id: Ifc581a654a4a763f1638bda12712dc35c28dbe2c

roles/baremetal-undercloud/README.md

@@ -49,7 +49,7 @@ Basically this command:
 * Uses a custom workdir that is rebuilt from scratch (so if it already exists, it is dropped, see *--clean*)
 * Get all the extra requirements
 * Select the config file
-* Chooses release (liberty, mitaka or “master” for newton)
+* Chooses release (liberty, mitaka, newton, or “master” for ocata)
 * Performs all the tasks in the playbook
 * Starts the installation on virthost
 

roles/overcloud-scale/README.md

@@ -6,9 +6,9 @@ An Ansible role for scaling and deleting nodes from an overcloud.
 Requirements
 ------------
 
-This role assumes it will be executed against a host on which a Liberty or Mitaka under/overcloud have already been deployed.
+This role assumes it will be executed against a host on which a Liberty, Mitaka, Newton, or Ocata under/overcloud have already been deployed.
 
-**Note:** The ansible-role-tripleo-overcloud-validate role must be accessible.
+**Note:** The validate-simple role must be accessible.
 
 Role Variables
 --------------

roles/overcloud-upgrade/doc/upgrade.rst

@@ -40,11 +40,10 @@ execute the pre tasks for undercloud and overcloud.
 Parameters
 ----------
 
-The upgrade role takes severals parameters as input. All those values are stored
-under default/main.yml.
-All of those values could be overriden.
-With the default values, you can upgrade a basic Tripleo environment from Liberty
-to Mitaka
+The upgrade role takes several parameters as input -- defaults are located
+in default/main.yml. All of these values can be overriden.
+With the default values, you can upgrade a basic TripleO environment from Liberty
+to Mitaka.
 
 Common Parameters
 `````````````````

roles/validate-ha/README.md

@@ -40,7 +40,7 @@ Basically this command:
 - Uses the same custom workdir where quickstart was first deployed
 - Get all the extra requirements
 - Select the specific config file (which must contain the floating network data)
-- Specifies the release (liberty, mitaka, newton or “master” for ocata)
+- Specifies the release (liberty, mitaka, newton, or “master” for ocata)
 - Performs all the tasks in the playbook overcloud-validate-ha.yml
 - Starts the installation on virthost
 

roles/validate-simple/templates/overcloud-validate.sh.j2

@@ -68,8 +68,8 @@ openstack image create {{ validate_image_name }} --public --container-format ami
 
 ## * Create external network
 
-## .. note: Liberty comparability:
-##    (heat can't create an external network in liberty)
+## .. note: Liberty compatibility:
+##    (heat can't create an external network in Liberty)
 ## ::
 
 if ! neutron net-list | grep 'nova'; then