Require handsoap in VimConnectMixin

[agrare]

Explicitly require handsoap in VimConnectMixin.raw_connect so that we
can catch a Handsoap::Fault exception.

[----] E, [2017-11-10T11:26:47.521471 #13497:10d3134] ERROR -- : MIQ(MiqQueue#deliver) Message id: [1000000000113], Error: [uninitialized constant VimConnectMixin::ClassMethods::Handsoap]
[----] E, [2017-11-10T11:26:47.521689 #13497:10d3134] ERROR -- : [NameError]: uninitialized constant VimConnectMixin::ClassMethods::Handsoap  Method:[block in method_missing]
[----] E, [2017-11-10T11:26:47.521758 #13497:10d3134] ERROR -- : /var/www/miq/vmdb/app/models/mixins/vim_connect_mixin.rb:65:in `rescue in validate_connection'
/var/www/miq/vmdb/app/models/mixins/vim_connect_mixin.rb:61:in `validate_connection'
/var/www/miq/vmdb/app/models/mixins/vim_connect_mixin.rb:51:in `raw_connect'
/var/www/miq/vmdb/app/models/miq_queue.rb:449:in `block in dispatch_method'

https://bugzilla.redhat.com/show_bug.cgi?id=1512019

[agrare]

cc @Fryguy

[miq-bot]

Checked commit agrare@3771aa4 with ruby 2.3.3, rubocop 0.47.1, and haml-lint 0.20.0
1 file checked, 0 offenses detected
Everything looks fine. 🏆

[simaishi]

gaprindashvili/yes ?

[agrare]

@simaishi yes

[simaishi]

Gaprindashvili backport details:

$ git log -1
commit c4139e27bdf15825e4442621b4c30290cee66217
Author: Greg Blomquist <blomquisg@gmail.com>
Date:   Wed Nov 15 17:20:58 2017 -0500

    Merge pull request #16450 from agrare/bz_1512019_explicitly_require_handsoap_to_catch_exception
    
    Require handsoap in VimConnectMixin
    (cherry picked from commit 0ec867c72982e7914fd3524cbc5d28efd422aef2)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1515444