Description of problem:
After update package, and run migrate-mongo-app-descriptors.rb to move mongo data to the new descriptor enabled format, then run migrate script, the following error is thrown out:
# ./migrate-2.0.4 
Getting all RHLogins...
RHLogins.length: 2
Gathering apps for user: jialiu with uuid: 534e1e9b1dcd4cda837e94676f699a43
/usr/lib/ruby/gems/1.8/gems/activemodel-3.0.10/lib/active_model/attribute_methods.rb:392:in `method_missing': undefined method `server_identity' for #<Application:0x7ff9acb157f8> (NoMethodError)
	from ./migrate-2.0.4:130:in `migrate'
	from ./migrate-2.0.4:128:in `each'
	from ./migrate-2.0.4:128:in `migrate'
	from ./migrate-2.0.4:125:in `each'
	from ./migrate-2.0.4:125:in `migrate'
	from ./migrate-2.0.4:124:in `initialize'
	from ./migrate-2.0.4:124:in `new'
	from ./migrate-2.0.4:124:in `migrate'
	from ./migrate-2.0.4:123:in `each'
	from ./migrate-2.0.4:123:in `migrate'
	from ./migrate-2.0.4:373


Version-Release number of selected component (if applicable):
Old instance: devenv_stage_127
After update packages:
rubygem-cloud-sdk-common-0.4.4-1.el6_2.noarch
rubygem-cloud-sdk-controller-0.4.6-1.el6_2.noarch
rubygem-cloud-sdk-node-0.4.5-1.el6_2.noarch
rhc-broker-0.86.6-1.el6_2.noarch
migrate-2.0.4

How reproducible:
Always

Steps to Reproduce:
1. Start a old instance (devenv_stage_127)
2. Create an app
3. Log into instance, upgrade packages to the latest.
# yum update
4. Run misc/maintenance/bin/migrate-mongo-app-descriptors.rb to move mongo data
to the new descriptor enabled format.
5. Run migrate script
# ./migrate-2.0.4

  
Actual results:
Error message is thrown out.


Expected results:
No error message is seen.

Additional info: