Use pool.sks-keyservers.net for apt-key of updated Erlang

Author: Roberto Quintanilla

Dockerfile

@@ -3,7 +3,7 @@ FROM debian:wheezy
 # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
 RUN groupadd -r rabbitmq && useradd -r -d /var/lib/rabbitmq -m -g rabbitmq rabbitmq
 
-RUN apt-key adv --keyserver keyserver.ubuntu.com --recv D208507CA14F4FCA
+RUN apt-key adv --keyserver pool.sks-keyservers.net --recv-keys 434975BD900CCBE4F7EE1B1ED208507CA14F4FCA
 RUN echo 'deb http://packages.erlang-solutions.com/debian wheezy contrib' > /etc/apt/sources.list.d/erlang.list
 
 # http://www.rabbitmq.com/install-debian.html