Backport upstream fix for management plugin

https://github.com/rabbitmq/rabbitmq-management/pull/84

Without this fix node may fail to start after network split.

Change-Id: I901055ea89b88edbbfa5350186ce3ad2d4bc71fb
Closes-Bug: #1513511

Backport fix for internal state corruption.

Upstream patch - https://github.com/rabbitmq/rabbitmq-common/pull/18

Change-Id: I1d2cd47305c0dfa8279e418088d8ab0e98e4ecc7
Partial-Bug: #1518264

Build rabbitmq 3.5.6 for ubuntu

debian/ from http://archive.ubuntu.com/ubuntu/pool/main/r/rabbitmq-server/rabbitmq-server_3.5.4-1.debian.tar.xz
RabbitMQ source from https://www.rabbitmq.com/releases/rabbitmq-server/v3.5.6/rabbitmq-server-3.5.6.tar.gz

Tune rabbitmq 3.5.6 for MOS:
 * Disable auto-start on package install.
 * Increase ulimit on number of file descriptors.

Change-Id: I0c2fcc524caeb9bdc4c048166fed7299350198ec

Added .gitreview