Use fixed apache-frontend 1.0.135.1

It has backported fix for name clash in etc/services, which were result with
apache not being able to restart.

See merge request !121

playbook/roles/standalone-shared/vars/main.yml

-frontend_software_release_url: https://lab.node.vifib.com/nexedi/slapos/raw/1.0.135/software/apache-frontend/software.cfg
+frontend_software_release_url: https://lab.nexedi.com/nexedi/slapos/raw/1.0.135.1/software/apache-frontend/software.cfg
 firewall_setup_template: setup-firewall.j2
 frontend_master_reference: master-frn-{{ playbook_name }}
 frontend_slave_reference: slave-srn-{{ playbook_name }}