update yum config

defaults/main.yml

diff --git a/defaults/main.yml b/defaults/main.yml
index c45cadc..39445ac 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -24,3 +24,25 @@
 - passlib
 - requests
 - kazoo
+
+yum_os_minimum_packages:
+- bind-utils
+- chkconfig
+- curl
+- tar
+- wget
+- yum-utils
+- unzip
+- rsync
+- which
+- libselinux-python
+- nss
+- openssh-clients
+- openssh-server
+- grep
+- rpm
+- rng-tools
+- sed
+- unzip
+- openldap-servers
+

tasks/with_no_proxy.yml

diff --git a/tasks/with_no_proxy.yml b/tasks/with_no_proxy.yml
index 388c3ed..214334e 100644
--- a/tasks/with_no_proxy.yml
+++ b/tasks/with_no_proxy.yml
@@ -22,25 +22,7 @@
   yum:
     name: "{{ item }}"
     state: present
-  with_items:
-  - bind-utils
-  - chkconfig
-  - curl
-  - tar
-  - wget
-  - yum-utils
-  - unzip
-  - rsync
-  - which
-  - libselinux-python
-  - nss
-  - openssh-clients
-  - openssh-server
-  - grep
-  - rpm
-  - rng-tools
-  - sed
-  - unzip
+  with_items: "{{ yum_os_minimum_packages }}"
 
 - name: Start rngd service
   service: