Fix event_catcher blacklisted events logging

[agrare]

The event catcher runner was printing the blacklisted events array using
the VMDBLogger#log_hashes method. Now that this method calls .to_hash
on the argument
(ManageIQ/manageiq-gems-pending#268)
this is throwing an exception for non-hash type arguments.

Instead of using log_hashes just log the elements of the array joined by
newlines directly.

/home/agrare/workspace/redhat/manageiq/plugins/manageiq-gems-pending/lib/gems/pending/util/vmdb-logger.rb:116:in `log_hashes'[----] I, [2017-09-07T09:08:21.914128 #28447:2ab55ee0f0cc]: undefined method `to_hash' for #<Array:0x00556ac8a4ef88> (NoMethodError)
Did you mean?  to_h
	from /home/agrare/workspace/redhat/manageiq/plugins/manageiq-gems-pending/lib/gems/pending/util/vmdb-logger.rb:128:in `log_hashes'
	from /home/agrare/workspace/redhat/manageiq/lib/vmdb/loggers/multicast_logger.rb:34:in `block in method_missing'
	from /usr/lib/ruby/2.3.0/set.rb:306:in `each_key'
	from /usr/lib/ruby/2.3.0/set.rb:306:in `each'
	from /home/agrare/workspace/redhat/manageiq/lib/vmdb/loggers/multicast_logger.rb:34:in `map'
	from /home/agrare/workspace/redhat/manageiq/lib/vmdb/loggers/multicast_logger.rb:34:in `method_missing'
	from /home/agrare/workspace/redhat/manageiq/app/models/manageiq/providers/base_manager/event_catcher/runner.rb:22:in `after_initialize'

[agrare]

Lesson learned, if you call log_hashes on an array you're gonna have a bad time

[miq-bot]

Checked commit agrare@fb28b8f with ruby 2.2.6, rubocop 0.47.1, and haml-lint 0.20.0
1 file checked, 0 offenses detected
Everything looks fine. 🏆

[Fryguy]

https://bugzilla.redhat.com/show_bug.cgi?id=1486397

[simaishi]

Fine backport details:

$ git log -1
commit e51d17241f9d00cdd04dc7963d191c015b1503df
Author: Jason Frey <[email protected]>
Date:   Thu Sep 7 10:46:40 2017 -0400

    Merge pull request #15945 from agrare/fix_event_catcher_log_hashes
    
    Fix event_catcher blacklisted events logging
    (cherry picked from commit 663651388b27e6eb3bc3ea10c1ad4185b2aacd7b)
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1531146