Escape paths properly

Author: nicolaven

Diff for: modules/40.install.monitoring.headnode.sh

@@ -76,7 +76,7 @@ configureMonitoring() {
 	sed -i "s/__AWS_REGION__/${cfn_region}/g"           	"${monitoring_home}/grafana/dashboards/ParallelCluster.json"
 
 	sed -i "s/__AWS_REGION__/${cfn_region}/g"           	"${monitoring_home}/grafana/dashboards/logs.json"
-	sed -i "s/__LOG_GROUP__NAMES__/${log_group_names}/g"    "${monitoring_home}/grafana/dashboards/logs.json"
+	sed -i "s~__LOG_GROUP__NAMES__~${log_group_names}~g"    "${monitoring_home}/grafana/dashboards/logs.json"
 
 	sed -i "s/__Application__/${stack_name}/g"          	"${monitoring_home}/prometheus/prometheus.yml"
 	sed -i "s/__AWS_REGION__/${cfn_region}/g"           	"${monitoring_home}/prometheus/prometheus.yml"