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Description of problem:
https://github.com/Apipie/apipie-bindings/commit/a6369fadb28472611d481c93ca42ae5df7fecbd4

This causes apipie-bindings to send optional parameters with required nested parameters to be sent. With the rails 4 deep munging converting empty arrays to nil this breaks api calls.

This may affect hammer as well.

Version-Release number of selected component (if applicable):
0.0.11

How reproducible:
Always

Steps to Reproduce:
1. create an OS via the API in Satellite 6.2 using apipie-bindings

Actual results:
2016-03-11 09:36:08 [app] [I]   Parameters: {"operatingsystem"=>{"name"=>"CentOS", "major"=>"6", "minor"=>"6", "family"=>"Redhat", "os_parameters_attributes"=>nil}, "apiv"=>"v2"}
2016-03-11 09:36:08 [app] [I] Authorized user admin(Admin User)
2016-03-11 09:36:08 [app] [W] Action failed
 | ArgumentError: Hash or Array expected, got NilClass (nil)

Expected results:
success

Additional info:
Should be updated to 0.0.14 as in foreman upstream
http://yum.theforeman.org/releases/1.11/el7/x86_64/rubygem-apipie-bindings-0.0.14-2.el7.noarch.rpm

I should say rather that the deep munging makes it impossible to work around it by sending an empty array or hash as it is converted to nil. 

Also, an updated apipie-bindings package has been built since this bug was opened and should fix the problem.

This should be available as of 6.2 -- if you find that it is not the case please re-open so that we may re-assess.