Example failures

https://buildbot.python.org/all/#/builders/117
https://buildbot.python.org/all/#/builders/106

======================================================================
ERROR: test_networked_good_cert (test.test_httplib.HTTPSTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/ssd/buildbot/buildarea/3.x.gps-ubuntu-exynos5-armv7l/build/Lib/test/test_httplib.py", line 1629, in test_networked_good_cert
    h.request('GET', '/')
  File "/ssd/buildbot/buildarea/3.x.gps-ubuntu-exynos5-armv7l/build/Lib/http/client.py", line 1229, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/ssd/buildbot/buildarea/3.x.gps-ubuntu-exynos5-armv7l/build/Lib/http/client.py", line 1275, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/ssd/buildbot/buildarea/3.x.gps-ubuntu-exynos5-armv7l/build/Lib/http/client.py", line 1224, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/ssd/buildbot/buildarea/3.x.gps-ubuntu-exynos5-armv7l/build/Lib/http/client.py", line 1016, in _send_output
    self.send(msg)
  File "/ssd/buildbot/buildarea/3.x.gps-ubuntu-exynos5-armv7l/build/Lib/http/client.py", line 956, in send
    self.connect()
  File "/ssd/buildbot/buildarea/3.x.gps-ubuntu-exynos5-armv7l/build/Lib/http/client.py", line 1391, in connect
    self.sock = self._context.wrap_socket(self.sock,
  File "/ssd/buildbot/buildarea/3.x.gps-ubuntu-exynos5-armv7l/build/Lib/ssl.py", line 405, in wrap_socket
    return self.sslsocket_class._create(
  File "/ssd/buildbot/buildarea/3.x.gps-ubuntu-exynos5-armv7l/build/Lib/ssl.py", line 853, in _create
    self.do_handshake()
  File "/ssd/buildbot/buildarea/3.x.gps-ubuntu-exynos5-armv7l/build/Lib/ssl.py", line 1117, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: EE certificate key too weak (_ssl.c:1055)
----------------------------------------------------------------------
Ran 105 tests in 2.477s

Got an error:
[SSL: SSLV3_ALERT_BAD_CERTIFICATE] sslv3 alert bad certificate (_ssl.c:1055)
Got an error:
[SSL: SSLV3_ALERT_BAD_CERTIFICATE] sslv3 alert bad certificate (_ssl.c:1055)
Got an error:
[SSL: SSLV3_ALERT_BAD_CERTIFICATE] sslv3 alert bad certificate (_ssl.c:1055)
test_local_bad_hostname (test.test_httplib.HTTPSTest) ...  server (('127.0.0.1', 41921):41921 ('TLS_AES_256_GCM_SHA384', 'TLSv1.3', 256)):
   [06/Feb/2019 06:22:07] code 404, message File not found
 server (('127.0.0.1', 41921):41921 ('TLS_AES_256_GCM_SHA384', 'TLSv1.3', 256)):
   [06/Feb/2019 06:22:07] "GET /nonexistent HTTP/1.1" 404 -
 server (('127.0.0.1', 41921):41921 ('TLS_AES_256_GCM_SHA384', 'TLSv1.3', 256)):
   [06/Feb/2019 06:22:07] code 404, message File not found
 server (('127.0.0.1', 41921):41921 ('TLS_AES_256_GCM_SHA384', 'TLSv1.3', 256)):
   [06/Feb/2019 06:22:07] "GET /nonexistent HTTP/1.1" 404 -
stopping HTTPS server
joining HTTPS thread
ok
test_local_good_hostname (test.test_httplib.HTTPSTest) ...  server (('127.0.0.1', 38877):38877 ('TLS_AES_256_GCM_SHA384', 'TLSv1.3', 256)):
   [06/Feb/2019 06:22:07] code 404, message File not found
 server (('127.0.0.1', 38877):38877 ('TLS_AES_256_GCM_SHA384', 'TLSv1.3', 256)):
   [06/Feb/2019 06:22:07] "GET /nonexistent HTTP/1.1" 404 -
stopping HTTPS server
joining HTTPS thread
ok
Got an error:
[SSL: TLSV1_ALERT_UNKNOWN_CA] tlsv1 alert unknown ca (_ssl.c:1055)
test_local_unknown_cert (test.test_httplib.HTTPSTest) ... stopping HTTPS server
joining HTTPS thread
ok

Multiple SSL failures, also old commits that previously succeeded fail now. This seems something in the buildbot itself. Gregory, do you know if something SLL related was upgraded/modify in the gps-ubuntu-exynos5-armv7l worker?