db tools: Rename do-destroy-*database.

The new tools now have more concise, more parallel names:

    - rebuild-dev-database
    - rebuild-test-database

The actual implementations are still pretty different:

rebuild-dev-database:
    mostly delegates to 5 management scripts

rebuild-test-database:
    is a very thin wrapper for generate-fixtures

We'll try to clean that up a bit soon.

tools/rebuild-dev-database

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -e
+set -x
+
+"$(dirname "$0")/../scripts/setup/terminate-psql-sessions" zulip zulip zulip_base
+
+psql -v ON_ERROR_STOP=1 -e -h localhost postgres zulip <<EOF
+DROP DATABASE IF EXISTS zulip;
+CREATE DATABASE zulip TEMPLATE zulip_base;
+EOF
+
+"$(dirname "$0")/../scripts/setup/flush-memcached"
+
+./manage.py purge_queue --all
+./manage.py migrate --noinput
+./manage.py get_migration_status --settings=zproject.settings --output="migration_status_dev"
+./manage.py createcachetable third_party_api_results
+./manage.py populate_db -n100 --threads=1
+# Ensure that the local user's API key is synced from ~/.zuliprc
+
+if [ -e ~/.zuliprc ]; then
+    ./manage.py sync_api_key
+fi