Update Erlang version on Fuel node

[Andrey Epifanov]

RMQ stuck on the Fuel node during the expanding the existing cloud.
The size of the env >100 nodes
MOS 9.2

RMQ version 3.6.11

Workaround:
Restart RMQ

[root@fuel ~]# rabbitmqctl status
Status of node rabbit@fuel
Error: unable to connect to node rabbit@fuel: nodedown

DIAGNOSTICS
===========

attempted to contact: [rabbit@fuel]

rabbit@fuel:
  * connected to epmd (port 4369) on fuel
  * epmd reports node 'rabbit' running on port 41055
  * TCP connection succeeded but Erlang distribution failed
  * suggestion: hostname mismatch?
  * suggestion: is the cookie set correctly?
  * suggestion: is the Erlang distribution using TLS?

current node details:
- node name: 'rabbitmq-cli-80@fuel'
- home dir: /var/lib/rabbitmq
- cookie hash: Q0hnUZA3Oeyl+hzJ0r0Zmg==

Testing results:
1. RabbitMQ 3.6.15 / Erlang 18.1 : FAIL ( Not 100% But, Fail)
2. RabbitMQ 3.6.16 / Erlang 18.1 : FAIL ( Not 100% But, Fail)
3. RabbitMQ 3.6.11 / Erlang 18.1 : FAIL ( Not 100% But, Fail) (MOS fuel default version)
4. RabbitMQ 3.6.11 / Erlang 18.3 : FAIL ( Not 100% But, Fail)
5. RabbitMQ 3.6.11 / Erlang 19.0 : FAIL ( Not 100% But, Fail)
6. RabbitMQ 3.6.11 / Erlang 19.1 : PASS ( All of 30 attempts passed )
7. RabbitMQ 3.6.11 / Erlang 19.3 : PASS ( All of 30 attempts passed )

[Fuel Devops McRobotson (fuel-devops-robot)]

Fix proposed to branch: 9.0
Change author: Denis V. Meltsaykin <email address hidden>
Review: https://review.fuel-infra.org/40091

[Fuel Devops McRobotson (fuel-devops-robot)]

Change abandoned by Denis V. Meltsaykin <email address hidden> on branch: 9.0
Review: https://review.fuel-infra.org/40091
Reason: Doesn't work that way.

[Fuel Devops McRobotson (fuel-devops-robot)]

Fix proposed to branch: 9.0
Change author: Denis V. Meltsaykin <email address hidden>
Review: https://review.fuel-infra.org/40096

[Fuel Devops McRobotson (fuel-devops-robot)]

Reviewed: https://review.fuel-infra.org/40096
Submitter: Pkgs Jenkins <email address hidden>
Branch: 9.0

Commit: e27f38f7d509e905d3d35cdda8248ab1bd6a804f
Author: Denis V. Meltsaykin <email address hidden>
Date: Sun Dec 30 17:01:18 2018

Update erlang to 19.3.6.12

The source for the spec file: https://github.com/rabbitmq/erlang-rpm/tree/v19.3.6.12
The source of code: https://github.com/erlang/otp/tree/OTP-19.3.6.12

Added Obsoletes and Conflicts sections since this spec compiles only one package
whereas the old one compiled dozen of pockages.

Change-Id: I3c9c5903d06d050ae457dc97eae29236fc125ed5
Closes-bug: #1809810

[Mikhail Samoylov (msamoylov)]

[root@nailgun ~]# erl -eval '{ok, Version} = file:read_file(filename:join([code:root_dir(), "releases", erlang:system_info(otp_release), "OTP_VERSION"])), io:fwrite(Version), halt().' -noshell
19.3.6.12

[Mikhail Samoylov (msamoylov)]

Verified