Description of problem:
Given some pending_ops are present in datastore, when trying to clean them up with oo-admin-clear-pending-ops, the admin tool is broken with error undefined method `op_type', see the details below.

Version-Release number of selected component (if applicable):
On devenv_3810

How reproducible:
Always

Steps to Reproduce:
1. Edit /opt/rh/ruby193/root/usr/share/gems/gems/openshift-origin-controller-1.15.0/app/models/cloud_user.rb, comment out lines to delete pending_op when the job is complete
eg:
#op.close_op
#op.delete
2. Add an ssh key to current account, pending operations will be created in cloud_users collection:
<snip>
"pending_ops" : [
		{
			"_id" : ObjectId("523e97cbcdcfb1ea01000001"),
			"_type" : "RemoveSshKeysUserOp",
			"completed_domain_ids" : [ ],
			"created_at" : ISODate("2013-09-22T07:10:03.109Z"),
			"keys_attrs" : [
				{
					"name" : "key1",
					"type" : "ssh-rsa",
					"content" : "AAAAB3NzaC1yc2EAAAADAQABAAABAQDN4zT4pk10pQdIsjXHGLbR3ks8JdRSvtubUTWAW9ERat0GHlxAOpQ1kDzzsjAK0T8s1fwRUEBPyKaGeu7iD6oBANlxel1ZXmg66E2aEmYDTK7MVU/riJCR3CG7jaN+NYdBPZaGYJK3XnBKPk9no30WocOKPdxeCIFARrrbCicQODznsGlX72Ceb47gXur4fUSUsf8Cs2IevIw+oQhtBxhazqgqTQ3cesS9KJougKiVgPZhs3gWqinU8tjtf3e2S014csoZYe1WVV67VOU+SFk8W2CIaI1KrOE1Ue7TxJI8cFok5bUxCmndUGNBjOCrPQoFJqfVKvjeGDRrSz9DRSRX",
					"_type" : "UserSshKey"
				}
			],
			"on_completion_method" : null,
			"on_domain_ids" : [ ],
			"state" : "queued",
			"updated_at" : ISODate("2013-09-22T07:10:03.109Z")
		},
		{
			"_id" : ObjectId("523e97d9cdcfb1ea01000002"),
			"_type" : "AddSshKeysUserOp",
			"completed_domain_ids" : [ ],
			"created_at" : ISODate("2013-09-22T07:10:17.599Z"),
			"keys_attrs" : [
				{
					"name" : "key1",
					"type" : "ssh-rsa",
					"content" : "AAAAB3NzaC1yc2EAAAADAQABAAABAQDN4zT4pk10pQdIsjXHGLbR3ks8JdRSvtubUTWAW9ERat0GHlxAOpQ1kDzzsjAK0T8s1fwRUEBPyKaGeu7iD6oBANlxel1ZXmg66E2aEmYDTK7MVU/riJCR3CG7jaN+NYdBPZaGYJK3XnBKPk9no30WocOKPdxeCIFARrrbCicQODznsGlX72Ceb47gXur4fUSUsf8Cs2IevIw+oQhtBxhazqgqTQ3cesS9KJougKiVgPZhs3gWqinU8tjtf3e2S014csoZYe1WVV67VOU+SFk8W2CIaI1KrOE1Ue7TxJI8cFok5bUxCmndUGNBjOCrPQoFJqfVKvjeGDRrSz9DRSRX",
					"_type" : "UserSshKey"
				}
			],
			"on_completion_method" : null,
			"on_domain_ids" : [ ],
			"state" : "queued",
			"updated_at" : ISODate("2013-09-22T07:10:17.599Z")
		}
	],

</snip>
3. Clear them with oo-admin-clear-pending-ops
oo-admin-clear-pending-ops -t 0

Actual results:
After step 3
[root@ip-10-46-105-231 ~]# oo-admin-clear-pending-ops -t 0
undefined method `op_type' for #<RemoveSshKeysUserOp:0x000000084b8130>
/opt/rh/ruby193/root/usr/share/gems/gems/mongoid-3.0.21/lib/mongoid/attributes.rb:249:in `method_missing'
/usr/sbin/oo-admin-clear-pending-ops:151:in `block in clean_user'
/opt/rh/ruby193/root/usr/share/gems/gems/mongoid-3.0.21/lib/mongoid/relations/proxy.rb:143:in `select'
/opt/rh/ruby193/root/usr/share/gems/gems/mongoid-3.0.21/lib/mongoid/relations/proxy.rb:143:in `method_missing'
/opt/rh/ruby193/root/usr/share/gems/gems/mongoid-3.0.21/lib/mongoid/relations/embedded/many.rb:396:in `method_missing'
/usr/sbin/oo-admin-clear-pending-ops:151:in `clean_user'
/usr/sbin/oo-admin-clear-pending-ops:195:in `block in <main>'
/opt/rh/ruby193/root/usr/share/gems/gems/mongoid-3.0.21/lib/mongoid/contextual/mongo.rb:577:in `yield_document'
/opt/rh/ruby193/root/usr/share/gems/gems/mongoid-3.0.21/lib/mongoid/contextual/mongo.rb:133:in `block (2 levels) in each'
/opt/rh/ruby193/root/usr/share/gems/gems/moped-1.3.2/lib/moped/query.rb:78:in `block in each'
/opt/rh/ruby193/root/usr/share/gems/gems/moped-1.3.2/lib/moped/cursor.rb:26:in `block in each'
/opt/rh/ruby193/root/usr/share/gems/gems/moped-1.3.2/lib/moped/cursor.rb:26:in `each'
/opt/rh/ruby193/root/usr/share/gems/gems/moped-1.3.2/lib/moped/cursor.rb:26:in `each'
/opt/rh/ruby193/root/usr/share/gems/gems/moped-1.3.2/lib/moped/query.rb:77:in `each'
/opt/rh/ruby193/root/usr/share/gems/gems/moped-1.3.2/lib/moped/query.rb:77:in `each'
/opt/rh/ruby193/root/usr/share/gems/gems/mongoid-3.0.21/lib/mongoid/contextual/mongo.rb:132:in `block in each'
/opt/rh/ruby193/root/usr/share/gems/gems/mongoid-3.0.21/lib/mongoid/contextual/mongo.rb:556:in `selecting'
/opt/rh/ruby193/root/usr/share/gems/gems/mongoid-3.0.21/lib/mongoid/contextual/mongo.rb:131:in `each'
/opt/rh/ruby193/root/usr/share/gems/gems/mongoid-3.0.21/lib/mongoid/contextual.rb:18:in `each'
/usr/sbin/oo-admin-clear-pending-ops:193:in `<main>'
0 applications were cleaned up. 1 users were cleaned up. 0 domains were cleaned up.


Expected results:
The pending_ops can be cleared successfully.

Additional info: