[Docs] Remove duplicate hardening content

Simplify the documentation by removing duplications.

Change-Id: I1097f443b70f4093668045248a8301c13262742c

deploy-guide/source/app-advanced-config-options.rst

@@ -9,6 +9,5 @@ Appendix I: Advanced configuration
    :maxdepth: 2
 
    app-advanced-config-override
-   app-advanced-config-security
    app-advanced-config-sslcertificates
    app-advanced-config-affinity

deploy-guide/source/app-advanced-config-security.rst

@@ -1,38 +0,0 @@
-.. _security_hardening:
-
-==================
-Security hardening
-==================
-
-OpenStack-Ansible automatically applies host security hardening configurations
-by using the `ansible-hardening`_ role. The role uses a version of the
-`Security Technical Implementation Guide (STIG)`_ that has been adapted for
-Ubuntu 14.04 and OpenStack.
-
-The role is applicable to physical hosts within an OpenStack-Ansible deployment
-that are operating as any type of node, infrastructure or compute. By
-default, the role is enabled. You can disable it by changing the value of
-the ``apply_security_hardening`` variable in the ``user_variables.yml`` file
-to ``false``:
-
-.. code-block:: yaml
-
-    apply_security_hardening: false
-
-You can apply security hardening configurations to an existing environment or
-audit an environment by using a playbook supplied with OpenStack-Ansible:
-
-.. code-block:: bash
-
-    # Apply security hardening configurations
-      openstack-ansible security-hardening.yml
-
-    # Perform a quick audit by using Ansible's check mode
-      openstack-ansible --check security-hardening.yml
-
-For more information about the security configurations, see the
-`OpenStack-Ansible host security`_ hardening documentation.
-
-.. _ansible-hardening: http://docs.openstack.org/developer/ansible-hardening/
-.. _Security Technical Implementation Guide (STIG): https://en.wikipedia.org/wiki/Security_Technical_Implementation_Guide
-.. _OpenStack-Ansible host security: http://docs.openstack.org/developer/ansible-hardening/

deploy-guide/source/app-security.rst

@@ -48,15 +48,36 @@ Host security hardening is required by several compliance and regulatory
 programs, such as the `Payment Card Industry Data Security Standard`_ (PCI
 DSS) (Requirement 2.2).
 
-By default, OpenStack-Ansible automatically applies the security hardening role
+By default, OpenStack-Ansible automatically applies the ansible-hardening role
 to all deployments. The role has been carefully designed to perform as follows:
 
 * Apply nondisruptively to a production OpenStack environment
 * Balance security with OpenStack performance and functionality
 * Run as quickly as possible
 
-For more information about configuring the role in OpenStack-Ansible, see
+The role is applicable to physical hosts within an OpenStack-Ansible deployment
-:ref:`security_hardening`.
+that are operating as any type of node, infrastructure or compute. By
+default, the role is enabled. You can disable it by changing the value of
+the ``apply_security_hardening`` variable in the ``user_variables.yml`` file
+to ``false``:
+
+.. code-block:: yaml
+
+    apply_security_hardening: false
+
+You can apply security hardening configurations to an existing environment or
+audit an environment by using a playbook supplied with OpenStack-Ansible:
+
+.. code-block:: bash
+
+    # Apply security hardening configurations
+      openstack-ansible security-hardening.yml
+
+    # Perform a quick audit by using Ansible's check mode
+      openstack-ansible --check security-hardening.yml
+
+For more information about the security configurations, see the
+`security hardening role`_ documentation.
 
 .. _security hardening role: http://docs.openstack.org/developer/ansible-hardening/
 .. _Security Technical Implementation Guide: https://en.wikipedia.org/wiki/Security_Technical_Implementation_Guide