Hammer CLI

Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1109934
Description of problem:
hammer activation-key pagination failed

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

How reproducible:

Steps to Reproduce:
1. Create 10 different activation keys under ACME_Corporation

1. hammer activation-key list --organization-label='ACME_Corporation' --page=1 --per-page=2
   ---|--------|----------------|-----------------------|-------------
   ID | NAME | CONSUMED | LIFECYCLE ENVIRONMENT | CONTENT VIEW
   ---|--------|----------------|-----------------------|-------------
   5 | actkey | 0 of Unlimited | |
   8 | ak1234 | 0 of Unlimited | | cv1
   ---|--------|----------------|-----------------------|-------------
   List next page? (Y/n): Y
   Error: can't convert Fixnum into String

1. hammer activation-key list --organization-label='ACME_Corporation' --page='1' --per-page='2'
   ---|--------|----------------|-----------------------|-------------
   ID | NAME | CONSUMED | LIFECYCLE ENVIRONMENT | CONTENT VIEW
   ---|--------|----------------|-----------------------|-------------
   5 | actkey | 0 of Unlimited | |
   8 | ak1234 | 0 of Unlimited | | cv1
   ---|--------|----------------|-----------------------|-------------
   List next page? (Y/n): y
   Error: can't convert Fixnum into String

Actual results:
Pagination failed

Expected results:
Pagination should work as expected

Additional info: