fuel plugin ldap is not idempotent

[Roman Sokolkov]

I'm using Fuel plugin ldap 3.0. Fuel 9.1.

It uses file_line with incorrect matches that will cause new few lines addition on the second run.

Affected
OPENSTACK_API_VERSIONS
OPENSTACK_KEYSTONE_MULTIDOMAIN_SUPPORT

https://github.com/openstack/fuel-plugin-ldap/blob/9.0/deployment_scripts/puppet/modules/plugin_ldap/manifests/controller.pp#L158-L170

Workaround: change matches to

^OPENSTACK_API_VERSIONS = {.*$
^OPENSTACK_KEYSTONE_MULTIDOMAIN_SUPPORT = .*$

Steps to reproduce:
- Deploy 9.1 + ldap plugin
- execute
epuppet apply --modulepath /etc/puppet/modules/:/etc/fuel/plugins/ldap-3.0/puppet/modules/ /etc/fuel/plugins/ldap-3.0/puppet/manifests/controller_site.pp

Expected result:
No new lines in /etc/openstack-dashboard/local_settings.py

Actual result:
New lines with the same content appeared