The path for the persistent VMs was incorrectly not always set

roles/lmn_vm/files/vm-run

@@ -165,6 +165,7 @@ EOF
     sleep 5
   else
     PERSISTENT=0;
+    VM_DIR="${VM_DIR_CONF}"
     echo "Die VM ${VM_NAME} wird nicht persistent gestartet!"
     sleep 5
   fi
@@ -181,6 +182,7 @@ GUEST_UID=0
 GUEST_GID=0
 
 source /etc/lmn/vm.conf
+VM_DIR_CONF="${VM_DIR}"
 
 TEMP=$(getopt -o no:ps --long new,no-viewer,options:,persistent,system,memory:,data-disk:,heads:,cpu:,bridge:,macvtap,os:,uid:,gid:,help -n $0 -- "$@")
 if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
@@ -191,6 +193,7 @@ while true; do
   case "$1" in
     -p | --persistent )
 	    PERSISTENT=1;
+	    VM_DIR="${VM_DIR_PERSISTENT}"
 	    shift
 	    ;;
     -n | --new )