Update certificates to expire in 2029

Update certificates that expire on 2021, to prolong their validity,
to make tests pass three years ahead.
diff --git a/tests/data_files/test-ca-alt.csr b/tests/data_files/test-ca-alt.csr
index 898c9e6..09bf678 100644
--- a/tests/data_files/test-ca-alt.csr
+++ b/tests/data_files/test-ca-alt.csr
@@ -1,16 +1,16 @@
 -----BEGIN CERTIFICATE REQUEST-----
 MIICgDCCAWgCAQAwOzELMAkGA1UEBhMCTkwxETAPBgNVBAoMCFBvbGFyU1NMMRkw
 FwYDVQQDDBBQb2xhclNTTCBUZXN0IENBMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8A
-MIIBCgKCAQEAtnK4qxQhSmuSeMseIAvvz3tpJCKaE/0hL83n8SfLIjyZdl0FQ61B
-XpzQvFM8PO/92e7Vt7iynm5+fvkBFWA7c+RwFn3JNcMGpxhS+p6B8O6oEOWpOhzK
-IqTwoQ+2emymwUYMdiFSqCG2l4dEJieKpWmHPayhmWh/b5rOacD8A05UKp5vlXpx
-uk4RWo1i3i/zJb3BneKSxwFoy+kthNL1OVkEeq3r+x3vaXbQ/7yzt9Jzjyeibg6f
-tYAeVCJtfoz/VsPDrEFSRxsqe9vXbyLxInIKfDUjQVAbQWR6UlSTPgT5cyqVyFW4
-iO6VNNat8btJpXr3lMy9LRNJ/WE+biHHpwIDAQABoAAwDQYJKoZIhvcNAQELBQAD
-ggEBAGHWUwqKMe+XwZ44u+1RKsH3jCXmxkBW4rwJwqtkrW8dzjCqFGmQoJeFivOA
-o0TPchkpQXGUNssFPbXZZsq7OBt1hPkH7wMxknztu+D4F9wJ2Oxpy8x44WeUr3pI
-rnl/VivUaywiIPMwR3W+7IIFTmzKfcSYf0l6uv4/A8BiSvtI4U9InfSvU+ENHuNH
-rb0ynhYEqy9NHA2exD0A/gQb40CAHtJL+sTVTRgxOx8xT8K8WAQufk0HSB6iel6M
-I+6VLnVjGJ5P/t6zPI4jcLzyg4V9DS282a/SadRFGc0uwPWxJW906BO5g6PNMaA8
-BdcuWaWwa2KQ/LuUCmumy+fC68E=
+MIIBCgKCAQEA1TBlP0knCl8cscCX3MS+MUp5Eqn75Bft43MylPneTJSnIr5D/UZv
+8CxCgHBScRvBAmTB4ccU/GA/g0lBAOUiNhtsRbvOH5jQij+KI3Aa8y1WLhoPg/r6
+6epovUOdUyDMUGsMZGLlPPb/UfUXkKK8KAxgEq06Qumwb14jJ5BcRZaTdO45KFI9
++Pury9t+dIEVxlBpzHH0uHtdz9kptikUb8qac/ApE8htVrWtyMXm+xLmbJrHUz7N
+55fmyP+oHH64TjpljyVRogTbzOGKQsbJ26xbE/FNJLNWLPtSUlcdHpM0QFEwrOwA
+ei6P4qYbEybNwX70+cPD0sfMLbL23P9XSwIDAQABoAAwDQYJKoZIhvcNAQELBQAD
+ggEBALje0yFtL/IqLip/X6NVc1oJ+2PgxOzVhEdZPcQ7F+mbDa9w6SvQN9pH4HXp
+P8AGLYnzQgmAlhsSOn7nhJSfQXlcuLdA/oVjhuRqiA+ZrlByeMfSiaBmCvLOWkwl
+FzF+/8HJRlV8B0mq0dIE3pWczAVFcTxRtIONUfmg3p0RWYkdg8y2S3H1n7OPKmM0
+DNC2o226ZFJEDVsQHfkFn3YO6HFLrPRi5jqTGgiNRH7KepZtppu59ZAAHmYzH02v
+PCrxD1MIMCpFfVTbdfPgC0S8TFY8GO5H0Gzy2ixaJVst2RwuGbp/3DK5ixDulV4R
+zbd5qcS3RXE5eQb6LwwNzOUpqLw=
 -----END CERTIFICATE REQUEST-----