Bump RabbitMQ to 3.8.0-beta.2

Author: gerhard

3.8-rc/alpine/Dockerfile

@@ -161,7 +161,7 @@ RUN set -eux; \
 	ln -sf "$RABBITMQ_DATA_DIR/.erlang.cookie" /root/.erlang.cookie
 
 # Use the latest stable RabbitMQ release (https://www.rabbitmq.com/download.html)
-ENV RABBITMQ_VERSION 3.8.0-beta.1
+ENV RABBITMQ_VERSION 3.8.0-beta.2
 # https://www.rabbitmq.com/signatures.html#importing-gpg
 ENV RABBITMQ_PGP_KEY_ID="0x0A9AF2115F4687BD29803A206B73A36E6026DFCA"
 ENV RABBITMQ_HOME=/opt/rabbitmq

3.8-rc/ubuntu/Dockerfile

@@ -169,7 +169,7 @@ RUN set -eux; \
 	ln -sf "$RABBITMQ_DATA_DIR/.erlang.cookie" /root/.erlang.cookie
 
 # Use the latest stable RabbitMQ release (https://www.rabbitmq.com/download.html)
-ENV RABBITMQ_VERSION 3.8.0-beta.1
+ENV RABBITMQ_VERSION 3.8.0-beta.2
 # https://www.rabbitmq.com/signatures.html#importing-gpg
 ENV RABBITMQ_PGP_KEY_ID="0x0A9AF2115F4687BD29803A206B73A36E6026DFCA"
 ENV RABBITMQ_HOME=/opt/rabbitmq