Fixup test for sending RST_STREAM frames.
Fixup test for sending RST_STREAM frames.

vladmunteanu/hyper-h2,python-hyper/hyper-h2,Kriechi/hyper-h2,Kriechi/hyper-h2,bhavishyagopesh/hyper-h2,vladmunteanu/hyper-h2,python-hyper/hyper-h2