JWT test failures on Windows

[wohali]

JwtAuthTest
  * test jwt auth with RSA secret (157.0ms)

  3) test jwt auth with RSA secret (JwtAuthTest)
     test/elixir/test/jwtauth_test.exs:36
     Assertion with == failed
     code:  assert resp.body()["userCtx"]["name"] == "couch@apache.org"
     left:  :null
     right: "couch@apache.org"
     stacktrace:
       test/elixir/test/jwtauth_test.exs:128: JwtAuthTest.test_fun/2
       (couchdbtest) test/elixir/lib/couch/db_test.ex:475: Couch.DBTest.run_on_modified_server/2
       test/elixir/test/jwtauth_test.exs:62: (test)

  * test jwt auth with HMAC secret (15.0ms)

  4) test jwt auth with HMAC secret (JwtAuthTest)
     test/elixir/test/jwtauth_test.exs:6
     Assertion with == failed
     code:  assert resp.body()["userCtx"]["name"] == "couch@apache.org"
     left:  :null
     right: "couch@apache.org"
     stacktrace:
       test/elixir/test/jwtauth_test.exs:128: JwtAuthTest.test_fun/2
       (couchdbtest) test/elixir/lib/couch/db_test.ex:475: Couch.DBTest.run_on_modified_server/2
       test/elixir/test/jwtauth_test.exs:23: (test)

  * test jwt auth with EC secret (16.0ms)

  5) test jwt auth with EC secret (JwtAuthTest)
     test/elixir/test/jwtauth_test.exs:75
     Assertion with == failed
     code:  assert resp.body()["userCtx"]["name"] == "couch@apache.org"
     left:  :null
     right: "couch@apache.org"
     stacktrace:
       test/elixir/test/jwtauth_test.exs:128: JwtAuthTest.test_fun/2
       (couchdbtest) test/elixir/lib/couch/db_test.ex:475: Couch.DBTest.run_on_modified_server/2
       test/elixir/test/jwtauth_test.exs:100: (test)

  * test jwt auth without secret (0.00ms)