Update the TLS certificates as they were expired and thereby failing the test cases.
Add a README.opensslcert to update certificates in future.
Certificates now have more than 5 years of expiry.

Change-Id: I1cc03a968ef42c5c9d4b160f9e5d8f12c8d7031a
diff --git a/src/test/setup/radius-config/freeradius/certs_2/ca.pem b/src/test/setup/radius-config/freeradius/certs_2/ca.pem
index 916cdf9..cdda0f5 100644
--- a/src/test/setup/radius-config/freeradius/certs_2/ca.pem
+++ b/src/test/setup/radius-config/freeradius/certs_2/ca.pem
@@ -1,28 +1,28 @@
 -----BEGIN CERTIFICATE-----
-MIIEyTCCA7GgAwIBAgIJAM6l2jUG56pLMA0GCSqGSIb3DQEBCwUAMIGLMQswCQYD
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 -----END CERTIFICATE-----