Fix name of the config_src variable in neutron_sriov role #655

Job	Run time
run_molecule (edpm_bootstrap)	6m 7s
run_molecule (edpm_ceph_client_files)	2m 30s
run_molecule (edpm_container_manage)	8m 16s
run_molecule (edpm_container_rm)	5m 32s
run_molecule (edpm_container_standalone)	3m 1s
run_molecule (edpm_logrotate_crond)	3m 6s
run_molecule (edpm_network_config)	9m 11s
run_molecule (edpm_neutron_sriov)	4m 14s
run_molecule (edpm_nftables)	11m 44s
run_molecule (edpm_nodes_validation)	3m 23s
run_molecule (edpm_nova_compute)	3m 36s
run_molecule (edpm_ovn)	16m 6s
run_molecule (edpm_sshd)	4m 8s
run_molecule (edpm_ssh_known_hosts)	5m 53s
run_molecule (edpm_timezone)	2m 27s
run_molecule (edpm_tuned)	8m 59s
run_molecule (edpm_telemetry)	5m 45s
run_molecule (env_data)	3m 23s
	1h 47m 21s

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