phosphor-ldap-conf: update nslcd.conf file for OpenLdap

update the config file with "filter group (objectclass=posixGroup)"
for OpenLdap.

Change-Id: I4a0a4693294745391d58d7ee9158c75468637f36
Signed-off-by: Nagaraju Goruganti <ngorugan@in.ibm.com>
1 file changed