add a script which regenerates the launchpad user list

this is based on the comments in the file, but an actual script is
even better.

fixed to handle changes in the launchpad mapper

Change-Id: If9612bc605ac4731516c3864a8c4dff87bc5a598
Reviewed-on: https://review.openstack.org/29695
Reviewed-by: Monty Taylor <mordred@inaugust.com>
Approved: Sean Dague <sean@dague.net>
Tested-by: Jenkins

openstack-config/regen.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+echo "Refreshing git repos"
+HERE=`pwd`
+cd ~/git/openstack
+for i in *; do
+  cd $i && git pull && cd ..
+done
+cd $HERE
+
+echo "Collecting revisions..."
+
+grep -v '^#' havana-all | \
+      while read project revisions; do \
+        cd ~/git/openstack/$project; \
+        git log | awk -F '[<>]' '/^Author:/ {print $2}'; \
+      done | sort | uniq | grep -v '\((none)\|\.local\)$' > tmp
+
+echo "Building email list..."
+
+sed 's/ /\n/' < aliases >> tmp
+sed 's/ /\n/' < other-aliases >> tmp
+(sort | uniq | grep -v '\((none)\|\.local\)$') < tmp > emails.txt
+
+echo "Mapping to launchpad ids"
+
+../tools/with_venv.sh python ../launchpad/map-email-to-lp-name.py \
+  $(cat emails.txt) | sort > launchpad-ids.txt