Revert "input_filters -> input_filter_specs"
Revert "input_filters -> input_filter_specs"

This reverts commit 81de78a8d240c4b22dded865167f2dc4356e97ae.

guliano/zf-apigility-admin,ildanno/zf-apigility-admin,guliano/zf-apigility-admin,jguittard/zf-apigility-admin,gartner/zf-apigility-admin,gartner/zf-apigility-admin,jguittard/zf-apigility-admin,ildanno/zf-apigility-admin