examples: Add esp-ssl example tests server/client

Closes IDF-1156

examples/protocols/openssl_server/server_certs/ca.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----