[Client] Accept ca_fingerprint with :

Author: picandocodigo

elasticsearch-transport/lib/elasticsearch/transport/client.rb

@@ -228,7 +228,7 @@ def validate_ca_fingerprints
           ssl.connect
           cert_store = ssl.peer_cert_chain
           matching_certs = cert_store.select do |cert|
-            OpenSSL::Digest::SHA256.hexdigest(cert.to_der).upcase == @ca_fingerprint.upcase
+            OpenSSL::Digest::SHA256.hexdigest(cert.to_der).upcase == @ca_fingerprint.upcase.gsub(':', '')
           end
           if matching_certs.empty?
             raise Elasticsearch::Transport::Transport::Error,