Bump RabbitMQ to 3.7.12 in Travis CI

Author: acogoluegnes

.travis.yml

@@ -14,7 +14,7 @@ addons:
       - sourceline: deb https://packages.erlang-solutions.com/ubuntu trusty contrib
         key_url: https://packages.erlang-solutions.com/ubuntu/erlang_solutions.asc
     packages:
-      - esl-erlang=1:21.2.4-1
+      - esl-erlang=1:21.2.6-1
 branches:
   only:
     - master

bin/before_build.sh

@@ -1,8 +1,8 @@
 #!/bin/sh
 
-wget https://github.com/rabbitmq/rabbitmq-server/releases/download/v3.7.11/rabbitmq-server-generic-unix-3.7.11.tar.xz
-tar xf rabbitmq-server-generic-unix-3.7.11.tar.xz
-mv rabbitmq_server-3.7.11 rabbitmq
+wget https://github.com/rabbitmq/rabbitmq-server/releases/download/v3.7.12/rabbitmq-server-generic-unix-3.7.12.tar.xz
+tar xf rabbitmq-server-generic-unix-3.7.12.tar.xz
+mv rabbitmq_server-3.7.12 rabbitmq
 
 rabbitmq/sbin/rabbitmq-server -detached