Fix test case to wait for correct error
Fix test case to wait for correct error

We were seeing intermittent failures on Travis CI for this test case.
The error being delivered was an empty file parse error. With these
changes, the test will wait for up to 1 second to observe the expected
type error.

Signed-off-by: Torin Sandall <933af5bec0bc58056526d55ca6c7b45fcf14cc48@gmail.com>

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