Fix integration test asserting errors on unknown template parameters (#977)

## Changes
Recent descriptions were made mandatory for input parameters so this
test started failing.

## Tests
The test passes now.

internal/testdata/init/field-does-not-exist/databricks_template_schema.json

@@ -2,7 +2,8 @@
     "properties": {
         "foo": {
             "type": "string",
-            "default": "abc"
+            "default": "abc",
+            "description": "foo-bar"
         }
     }
 }