Fix indenting for comments in ConfigValidator
Fix indenting for comments in ConfigValidator

The Rubydoc comments under the heading 'Recursion in this class' were
being formatted as code by [Yard](http://yardoc.org/) because of they
were indented.

Fix the indentation so that the comments are formatted correctly.

UKHomeOffice/vcloud-core,UKHomeOffice/vcloud-core,gds-operations/vcloud-core,gds-operations/vcloud-core