add 'Completely Free' category to category list
add 'Completely Free' category to category list

Change-Id: Ia1d9f192e98bbdc80a9b4622bc8d3e4e7ef120b0
Reviewed-on: https://gerrit.instructure.com/23051
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Brad Humphrey <9233b6f5388d6867a2a7be14d8b4ba53c86cfde2@instructure.com>
Product-Review: Brian Whitmer <760e7dab2836853c63805033e514668301fa9c47@instructure.com>
QA-Review: Brian Whitmer <760e7dab2836853c63805033e514668301fa9c47@instructure.com>

whitmer/edu_apps,whitmer/edu_apps