[Crypto] Add an option to ConfiguredSSLContext allowing to fallback to the JVM default CACERT if the specified store do not contain the desired material.

[arcadmlafon]

Add an option allowing to take advantage of the defult trusted certificates in the JVM CACERT store.

This boolean option "ssl.truststore.default" require to merge the X509TrustManage from the current turst store and the JVM default one.