Refactored active/passive section of HA guide

As part of the restructuring of the HA guide to include
active/active, the original active/passive page files
are now renamed to be prefaced with "ap-" to distinguish
them from the active/active pages, prefaced with "aa-".
The main ha-guide.txt file has also been edited to
reflect this change.

bug 1196096
blueprint improve-high-availability-support

Change-Id: I303f502a641278d1cdc9663381afd4c2be7cc67c

doc/src/docbkx/openstack-ha/api-node.txt → doc/src/docbkx/openstack-ha/ap-api-node.txt

@@ -4,9 +4,9 @@
 The API node exposes OpenStack API endpoints onto external network (Internet).
 It needs to talk to the Cloud Controller on the management network.
 
-include::api-vip.txt[]
-include::keystone.txt[]
-include::glance-api.txt[]
-include::cinder-api.txt[]
-include::quantum-server.txt[]
-include::api-pacemaker.txt[]
+include::ap-api-vip.txt[]
+include::ap-keystone.txt[]
+include::ap-glance-api.txt[]
+include::ap-cinder-api.txt[]
+include::ap-quantum-server.txt[]
+include::ap-api-pacemaker.txt[]

doc/src/docbkx/openstack-ha/cloud-controller.txt → doc/src/docbkx/openstack-ha/ap-cloud-controller.txt

@@ -3,5 +3,5 @@
 
 The Cloud Controller sits on the management network and needs to talk to all other services.
 
-include::mysql.txt[]
-include::rabbitmq.txt[]
+include::ap-mysql.txt[]
+include::ap-rabbitmq.txt[]

doc/src/docbkx/openstack-ha/ha-guide.txt

@@ -5,9 +5,9 @@
 include::intro.txt[]
 
 include::ap-overview.txt[]
-include::pacemaker.txt[]
-include::cloud-controller.txt[]
-include::api-node.txt[]
+include::ap-pacemaker.txt[]
+include::ap-cloud-controller.txt[]
+include::ap-api-node.txt[]
 
 include::aa-overview.txt[]
 include::aa-database.txt[]