Replace duplicate random generator with common function

setup/so-variables

@@ -12,7 +12,7 @@ export num_cpu_cores
 readarray -t cpu_core_list <<< "$(grep "processor" /proc/cpuinfo | grep -v "KVM" | awk '{print $3}')"
 export cpu_core_list
 
-random_uid=$(</dev/urandom tr -dc 'a-zA-Z0-9' | fold -w 16 | head -n 1)
+random_uid=$(get_random_value 16)
 export random_uid
 
 node_es_port=9200