added type cast to ldap_type

templates/silent-install.conf.j2

diff --git a/templates/silent-install.conf.j2 b/templates/silent-install.conf.j2
index e4adbd6..88b90a4 100644
--- a/templates/silent-install.conf.j2
+++ b/templates/silent-install.conf.j2
@@ -5,7 +5,7 @@
 LICENSE_FILE={{ opdk_license_target_file_path }}
 USE_LDAP_REMOTE_HOST={{ opdk_ldap_remote_host }}
 
-LDAP_TYPE={{ opdk_ldap_type + '' }}
+LDAP_TYPE='{{ opdk_ldap_type }}'
 {% if opdk_ldap_type == '2' %}
 {% if groups['dc-1-ldap'] is defined and groups['dc-2-ldap'] is defined and inventory_hostname in groups['dc-1'] %}
 LDAP_SID=1