flaky streams map test

[marten-seemann]

Streams Map (outgoing) with stream ID limits 
  queues a STREAMS_BLOCKED frame when there more streams waiting for OpenStreamSync than MAX_STREAMS allows
  D:/a/quic-go/quic-go/streams_map_outgoing_generic_test.go:366

+ Failure [0.055 seconds]
Streams Map (outgoing)
D:/a/quic-go/quic-go/streams_map_outgoing_generic_test.go:19
  with stream ID limits
  D:/a/quic-go/quic-go/streams_map_outgoing_generic_test.go:117
    queues a STREAMS_BLOCKED frame when there more streams waiting for OpenStreamSync than MAX_STREAMS allows [It]
    D:/a/quic-go/quic-go/streams_map_outgoing_generic_test.go:366

    Timed out after 0.054s.
    Expected
        <int>: 0
    to equal
        <int>: 2

    D:/a/quic-go/quic-go/streams_map_outgoing_generic_test.go:32

    Full Stack Trace
    github.com/lucas-clemente/quic-go.glob..func36.1(0x2)
    	D:/a/quic-go/quic-go/streams_map_outgoing_generic_test.go:32 +0x148
    github.com/lucas-clemente/quic-go.glob..func36.4.13()
    	D:/a/quic-go/quic-go/streams_map_outgoing_generic_test.go:383 +0xe4
    github.com/onsi/ginkgo/internal/leafnodes.(*runner).runSync(0x1228a140, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
    	C:/Users/runneradmin/go/pkg/mod/github.com/onsi/ginkgo@v1.14.2/internal/leafnodes/runner.go:113 +0x7a
    github.com/onsi/ginkgo/internal/leafnodes.(*runner).run(0x1228a140, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
    	C:/Users/runneradmin/go/pkg/mod/github.com/onsi/ginkgo@v1.14.2/internal/leafnodes/runner.go:64 +0x89
    github.com/onsi/ginkgo/internal/leafnodes.(*ItNode).Run(0x1209ece0, 0x92bbb0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
    	C:/Users/runneradmin/go/pkg/mod/github.com/onsi/ginkgo@v1.14.2/internal/leafnodes/it_node.go:26 +0x3b
    github.com/onsi/ginkgo/internal/spec.(*Spec).runSample(0x123d7e80, 0x0, 0x92bbb0, 0x12107080)
    	C:/Users/runneradmin/go/pkg/mod/github.com/onsi/ginkgo@v1.14.2/internal/spec/spec.go:215 +0x4b9
    github.com/onsi/ginkgo/internal/spec.(*Spec).Run(0x123d7e80, 0x92bbb0, 0x12107080)
    	C:/Users/runneradmin/go/pkg/mod/github.com/onsi/ginkgo@v1.14.2/internal/spec/spec.go:138 +0xc6
    github.com/onsi/ginkgo/internal/specrunner.(*SpecRunner).runSpec(0x12046210, 0x123d7e80, 0x0)
    	C:/Users/runneradmin/go/pkg/mod/github.com/onsi/ginkgo@v1.14.2/internal/specrunner/spec_runner.go:200 +0xd1
    github.com/onsi/ginkgo/internal/specrunner.(*SpecRunner).runSpecs(0x12046210, 0x1)
    	C:/Users/runneradmin/go/pkg/mod/github.com/onsi/ginkgo@v1.14.2/internal/specrunner/spec_runner.go:170 +0xf7
    github.com/onsi/ginkgo/internal/specrunner.(*SpecRunner).Run(0x12046210, 0x12169f68)
    	C:/Users/runneradmin/go/pkg/mod/github.com/onsi/ginkgo@v1.14.2/internal/specrunner/spec_runner.go:66 +0xf1
    github.com/onsi/ginkgo/internal/suite.(*Suite).Run(0x12040140, 0x32150778, 0x1202b0a0, 0x85ce45, 0xa, 0x120071d8, 0x1, 0x1, 0x931060, 0x12107080, ...)
    	C:/Users/runneradmin/go/pkg/mod/github.com/onsi/ginkgo@v1.14.2/internal/suite/suite.go:79 +0x3e6
    github.com/onsi/ginkgo.RunSpecsWithCustomReporters(0x92c0d0, 0x1202b0a0, 0x85ce45, 0xa, 0x1203df84, 0x1, 0x1, 0x2ebc6c)
    	C:/Users/runneradmin/go/pkg/mod/github.com/onsi/ginkgo@v1.14.2/ginkgo_dsl.go:229 +0x181
    github.com/onsi/ginkgo.RunSpecs(0x92c0d0, 0x1202b0a0, 0x85ce45, 0xa, 0xb9c6c0)
    	C:/Users/runneradmin/go/pkg/mod/github.com/onsi/ginkgo@v1.14.2/ginkgo_dsl.go:210 +0x128
    github.com/lucas-clemente/quic-go.TestQuicGo(0x1202b0a0)
    	D:/a/quic-go/quic-go/quic_suite_test.go:16 +0x7a
    testing.tRunner(0x1202b0a0, 0x88bcf4)
    	C:/hostedtoolcache/windows/go/1.15.6/x64/src/testing/testing.go:1123 +0xb7
    created by testing.(*T).Run
    	C:/hostedtoolcache/windows/go/1.15.6/x64/src/testing/testing.go:1168 +0x211