[ Merge of http://go/wvgerrit/18295 ]
SSL v3 is being disabled across Google infrastructure. Networking
code in integration tests used SSL v3 during HTTPS protocol negotiation.
Once this is disabled, it will cause integration test failures at
staging and UAT license servers.
With this change the client will use TLS 1.2. Insecure cipher suites
(TLS_RSA_WITH_RC4_128_MD5, TLS_RSA_WITH_RC4_128_SHA,
TLS_ECDHE_ECDSA_WITH_RC4_128_SHA, TLS_ECDHE_RSA_WITH_RC4_128_SHA)
have been disabled as well.
b/29356581
Change-Id: I98a04d345fe83c48132b9d79986a21cc84827dc8