TT#83753 Port status server to py3

The /usr/bin/python symlink/binary no longer exists in recent
Grml-Sipwise ISOs and python3 doesn't ship SimpleHTTPServer but
http.server instead.

Change-Id: I6677e8a416b142034d99d5b1d2b11ba74d87a6ec
(cherry picked from commit 862fb155f0)

templates/scripts/includes/deployment.sh

@@ -72,12 +72,12 @@ enable_deploy_status_server() {
   mkdir -p "${STATUS_DIRECTORY}"
 
   # get rid of already running process
-  PID=$(pgrep -f 'python.*SimpleHTTPServer') || true
+  PID=$(pgrep -f 'python3.*http.server') || true
   [ -n "$PID" ] && kill "$PID"
 
   (
     cd "${STATUS_DIRECTORY}"
-    python -m SimpleHTTPServer 4242 >/tmp/status_server.log 2>&1 &
+    python3 -m http.server 4242 >/tmp/status_server.log 2>&1 &
   )
 }