Pin rabbitmq-server to 3.7.10

New version of rabbitmq-server in epel but not new enough version of
erlang available in epel or delorean-trunk repos.

Closes-Bug: #1814233
Change-Id: Iac3cad17ff8279a2be66ffe1366d6844f999d66f

docker/rabbitmq/Dockerfile.j2

@@ -9,10 +9,12 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 
 {% block rabbitmq_install %}
 {% if base_package_type == 'rpm' %}
+# NOTE(mandre) Remove rabbitmq-server pinning once package dependencies are met
+# https://bugs.launchpad.net/kolla/+bug/1814233
     {% set rabbitmq_packages = [
         'erlang-hipe',
         'hostname',
-        'rabbitmq-server'
+        'rabbitmq-server-3.7.10'
     ] %}
 
 {% elif base_package_type == 'deb' %}