Update Dockerfile

to always reflect correct version of the jar when copying.

Author: karthikkondapally

examples/Dockerfile

@@ -1,6 +1,6 @@
 FROM openjdk:8-jre
 
-COPY target/client-java-examples-3.0.0-beta2-SNAPSHOT-jar-with-dependencies.jar /examples.jar
+COPY target/client-java-examples-*-SNAPSHOT-jar-with-dependencies.jar /examples.jar
 
 CMD ["java", "-jar", "/examples.jar"]