Use rego.ParsedInput to provide input from form
Use rego.ParsedInput to provide input from form

The debug form was passing the parsed input as a Go native interface{}
which caused the Rego package to attempt to treat ast.Valeu as a Go
native value (which fails.)

Fixes #571

open-policy-agent/opa,open-policy-agent/opa,open-policy-agent/opa,tsandall/opa,open-policy-agent/opa,tsandall/opa,tsandall/opa,open-policy-agent/opa,tsandall/opa,tsandall/opa,open-policy-agent/opa,tsandall/opa