add allow privileged option

defaults/main.yml

@@ -21,3 +21,4 @@ nomad_host_networks:
   #    cidr:
   #    interface:
   #    reserved_ports:
+nomad_allow_privileged: False

templates/config.hcl.j2

@@ -41,6 +41,7 @@ plugin "docker"{
       enabled      = true
       selinuxlabel = "z"
     }
+    allow_privileged = {{ nomad_allow_privileged|lower }}
   }
 }