Introduce a before build script

Preparing for rabbitmq/rabbitmq-management#236 to land.

Author: michaelklishin

.gitignore

@@ -15,4 +15,8 @@ spec/reports
 test/tmp
 test/version_tmp
 tmp
-bin/*
+bin/autospec
+bin/bundler
+bin/rspec
+bin/ldiff
+bin/htmldiff

bin/before_build.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+${RUBY_RABBITMQ_HTTP_API_CLIENT_RABBITMQCTL:="sudo rabbitmqctl"}
+
+# guest:guest has full access to /
+
+$RUBY_RABBITMQ_HTTP_API_CLIENT_RABBITMQCTL add_vhost /
+$RUBY_RABBITMQ_HTTP_API_CLIENT_RABBITMQCTL add_user guest guest
+$RUBY_RABBITMQ_HTTP_API_CLIENT_RABBITMQCTL set_permissions -p / guest ".*" ".*" ".*"
+
+# Reduce retention policy for faster publishing of stats
+$RUBY_RABBITMQ_HTTP_API_CLIENT_RABBITMQCTL eval 'supervisor2:terminate_child(rabbit_mgmt_sup_sup, rabbit_mgmt_sup), application:set_env(rabbitmq_management, sample_retention_policies, [{global, [{605, 1}]}, {basic, [{605, 1}]}, {detailed, [{10, 1}]}]), rabbit_mgmt_sup_sup:start_child().'