Replace current Base64

[jabrena]

Description

Review the usage of Base64 because it throws a warning in the Pipeline:

/home/runner/work/amadeus-java/amadeus-java/src/main/java/com/amadeus/travel/TripParser.java:9: warning: Base64 is internal proprietary API and may be removed in a future release
import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;

Analyse to replace with Base64:

https://docs.oracle.com/javase/8/docs/api/java/util/Base64.html

Juan Antonio