Description of problem:
They cannot complete the upgrade from 4.2 to 4.5 because of yum update/new gem set version issue. 


They were following this documentation to upgrade and ran into the issue in step 6 of section 1.5 

https://access.redhat.com/documentation/en-us/red_hat_cloudforms/4.5/html/migrating_to_red_hat_cloudforms_4.5/index


[root@sv72cf41 vmdb]# rake db:migrate
Could not find psych-2.0.17 in any of the sources
Run `bundle install` to install missing gems.


Tried to roll back using https://access.redhat.com/solutions/3393371

yum history | awk 'NR==4 {print $1}' | yum history info | awk '{print $2}' | xargs -d '\n' yum downgrade -y

Disabled 5.8 repos and renabled 5.7 repos without any luck.


Version-Release number of selected component (if applicable):
CFME 5.7 to CFME 5.8

How reproducible:
Everytime

Steps to Reproduce:
1.
2.
3.

Actual results:


Expected results:


Additional info: