Fix failure when missing property in dna.json

If cw_logging_enabled is missing from dna.json, clustermgtd
fails to start due to an unparsable boolean value. This change
provides a default value of true to the clustermgtd.conf
template if the property is missing.

Author: davprat

cookbooks/aws-parallelcluster-slurm/templates/default/slurm/parallelcluster_clustermgtd.conf.erb

@@ -11,6 +11,6 @@ head_node_private_ip = <%= node['ec2']['local_ipv4'] %>
 head_node_hostname = <%= node['ec2']['local_hostname'] %>
 node_replacement_timeout = <%= node['cluster']['compute_node_bootstrap_timeout'] %>
 insufficient_capacity_timeout = 600
-compute_console_logging_enabled = <%= node['cluster']['cw_logging_enabled'] %>
+compute_console_logging_enabled = <%= node['cluster']['cw_logging_enabled'] || true %>
 compute_console_logging_max_sample_size = <%=  node['cluster']['slurm_plugin_console_logging']['sample_size'] %>
 compute_console_wait_time = 300