spdy from ubuntu_k8s_unit_tests failed with Groovy-5.8 GCP

[Kelsey Steele]

Found on Groovy/gcp 5.8.0-1015.15

Not a regression since also found on 5.8.0-1012.12

2020/12/16 15:15:27 http: TLS handshake error from 127.0.0.1:60408: tls: certificate RSA key size too small for supported signature algorithms
2020/12/16 15:15:27 http: TLS handshake error from 127.0.0.1:41238: tls: certificate RSA key size too small for supported signature algorithms
--- FAIL: TestRoundTripAndNewConnection (0.01s)
    --- FAIL: TestRoundTripAndNewConnection/redirect_=_false (0.01s)
        roundtripper_test.go:326: proxied https (invalid hostname + InsecureSkipVerify) -> https (invalid hostname): shouldError=false, got true: Get "https://127.0.0.1:38339": remote error: tls: handshake failure
    --- FAIL: TestRoundTripAndNewConnection/redirect_=_true (0.00s)
        roundtripper_test.go:326: proxied https with auth (valid hostname + RootCAs) -> https (valid hostname + RootCAs): shouldError=false, got true: Get "https://127.0.0.1:44779": remote error: tls: handshake failure
FAIL
FAIL k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/util/httpstream/spdy 0.046s

[Sintayew Gashaw (sintayew4)]

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