Updates to docs and sequence of role invocations.

apigee-os-pre-requisites.yml

diff --git a/apigee-os-pre-requisites.yml b/apigee-os-pre-requisites.yml
index 7b6820e..55149cf 100644
--- a/apigee-os-pre-requisites.yml
+++ b/apigee-os-pre-requisites.yml
@@ -12,6 +12,7 @@
   - { role: apigee-opdk-yum-repository-proxy-config, tags: ['yum-proxy-config']}
   - { role: apigee-opdk-setup-os-minimum, tags: ['os-minimum'] }
   - { role: apigee-opdk-setup-os-limits, tags: ['apigee-tuning'] }
+  - { role: apigee-opdk-setup-os-sysctl, tags: ['apigee-tuning'] }
   - { role: apigee-opdk-setup-selinux-disable, tags: ['selinux'] }
   - { role: apigee-server-restart, tags: ['restart-server'], start_check_delay: 30, when: (selinux_disabled is defined and selinux_disabled.changed) or (iptables_disabled is defined and not iptables_disabled) or (force_restart is defined and force_restart)  }
   - { role: apigee-opdk-setup-os-common, tags: ['os-common'] }

install-edge-requirements.yml

diff --git a/install-edge-requirements.yml b/install-edge-requirements.yml
index d7bc65b..e0fa1ce 100644
--- a/install-edge-requirements.yml
+++ b/install-edge-requirements.yml
@@ -75,3 +75,4 @@
 - src: https://github.com/carlosfrias/apigee-opdk-setup-os-pip.git
 - src: https://github.com/carlosfrias/apigee-opdk-debug-mode.git
 - src: https://github.com/carlosfrias/apigee-opdk-setup-message-processor-bind-environment.git
+- src: https://github.com/carlosfrias/apigee-opdk-setup-os-sysctl.git

install-edge.yml

diff --git a/install-edge.yml b/install-edge.yml
index 3b22d1f..0986d96 100644
--- a/install-edge.yml
+++ b/install-edge.yml
@@ -5,18 +5,18 @@
   vars:
     target_hosts: edge
 
-- name: Install and configure OS pre-requisites
-  import_playbook: apigee-os-pre-requisites.yml
-  tags: ['os']
-  vars:
-    target_hosts: edge
-
 - name: Install and configure Openldap pre-requisites
   import_playbook: apigee-os-pre-requisites-epel.yml
   tags: ['os', 'os-epel']
   vars:
     target_hosts: edge
 
+- name: Install and configure OS pre-requisites
+  import_playbook: apigee-os-pre-requisites.yml
+  tags: ['os']
+  vars:
+    target_hosts: edge
+
 - name: Install and configure Openldap pre-requisites
   import_playbook: apigee-os-pre-requisites-openldap.yml
   tags: ['os', 'os-openldap']