Add auto cluster configuration support

[vchepkov]

• added clustername fact and spec tests for it
• added rabbitmq_cluster type and provider with tests

Pull Request (PR) description

This Pull Request (PR) fixes the following issues

[bastelfreak]

Hey @vchepkov, thanks for picking this up. Can you take a look at the failing travis jobs?

[vchepkov]

I afraid tests are not my forte. I will see if I can copy&paste something, that's an extent of my expertise here :)

[KlavsKlavsen]

Really hoping this gets in.. would make cluster setup soo much easier :)

[KlavsKlavsen]

I just realized that if you give rabbitmq nodenames in FQDN format - it removes the domain part - and you cannot join - unless you give that name (ie. hostname part only). But in the acceptance test here - init_node is set from $facts['fqdn'] - which won't work..
This should probably strip domain name part of a node name - before trying to join atleast.

[vox-pupuli-tasks]

Dear @vchepkov, thanks for the PR!

This is pccibot, your friendly Vox Pupuli GitHub Bot. I noticed that your pull request contains merge conflict. Can you please rebase?

You can find my sourcecode at voxpupuli/vox-pupuli-tasks

[vox-pupuli-tasks]

Dear @vchepkov, thanks for the PR!

This is pccibot, your friendly Vox Pupuli GitHub Bot. I noticed that your pull request contains merge conflict. Can you please rebase?

You can find my sourcecode at voxpupuli/vox-pupuli-tasks

[vox-pupuli-tasks]

Dear @vchepkov, thanks for the PR!

This is pccibot, your friendly Vox Pupuli GitHub Bot. I noticed that your pull request contains merge conflict. Can you please rebase?

You can find my sourcecode at voxpupuli/vox-pupuli-tasks

[vox-pupuli-tasks]

Dear @vchepkov, thanks for the PR!

This is pccibot, your friendly Vox Pupuli GitHub Bot. I noticed that your pull request contains merge conflict. Can you please rebase?

You can find my sourcecode at voxpupuli/vox-pupuli-tasks

[Fabian1976]

I ran in to this issue also because i used FQDN as cluster_node names

rabbitmq::cluster_nodes:
  - 'local-o-rmq001.example.com'
  - 'local-o-rmq002.example.com'
  - 'local-o-rmq003.example.com'

But switching them to hostname only:

rabbitmq::cluster_nodes:
  - 'local-o-rmq001'
  - 'local-o-rmq002'
  - 'local-o-rmq003'

(and make sure they would resolve in DNS, made the cluster work.