Add supports_conversion_host to Vm

[djberg96]

This sets supports :conversion_host to the Vm model.

The main purpose for this is for the ManageIQ REST API, where support for conversion_host will be checked before attempting to enable or disable the resource.

Part of the V2V effort.

https://bugzilla.redhat.com/show_bug.cgi?id=1622728
https://bugzilla.redhat.com/show_bug.cgi?id=1695810

[miq-bot]

Checked commit https://github.com/djberg96/manageiq-providers-openstack/commit/05c3dea510b2a1ab7cfe5dd001e42dddb556b233 with ruby 2.3.3, rubocop 0.52.1, haml-lint 0.20.0, and yamllint 1.10.0
2 files checked, 0 offenses detected
Everything looks fine. 🍪

[djberg96]

@miq-bot add_label hammer/yes

[simaishi]

Hammer backport details:

$ git log -1
commit 1de7b35994a4b5da7a923a91983688a7504e9de8
Author: Samuel Lucidi <mansam@csh.rit.edu>
Date:   Mon Dec 3 12:39:46 2018 -0500

    Merge pull request #407 from djberg96/supports_conversion_host
    
    Add supports_conversion_host to Vm
    
    (cherry picked from commit 75c73724e034c062566ac789323bcf7c1d691ec5)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1694229

[simaishi]

Reverted the backport:

commit 989a782bcfde3befd4d13cab19a3d956bf8cf4df
Author: Satoe Imaishi <simaishi@redhat.com>
Date:   Mon Apr 1 11:26:19 2019 -0400

    Revert "Merge pull request #407 from djberg96/supports_conversion_host"
    
    This reverts commit 1de7b35994a4b5da7a923a91983688a7504e9de8.

[simaishi]

Hammer backport details:

$ git log -1
commit 89747aa4890f7efd505a8f65f12e71c4ba47d741
Author: Samuel Lucidi <mansam@csh.rit.edu>
Date:   Mon Dec 3 12:39:46 2018 -0500

    Merge pull request #407 from djberg96/supports_conversion_host
    
    Add supports_conversion_host to Vm
    
    (cherry picked from commit 75c73724e034c062566ac789323bcf7c1d691ec5)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1702019