✨ [Docker] Migrated from java-11-openjdk to java-11-openjdk-headless JVM package

[Coduz]

This PR changes the version of JDK 11 installed on our java-base image.

Moving to this JDK we optimize the Docker Image footprint

Comparison with standard version:

Container	java-11-openjdk	java-11-openjdk-headless
kapua/java-base	610 MB	591 MB
kapua/jetty-base	659 MB	639 MB
kapua/kapua-sql	615 MB	595 MB
kapua/kapua-events-broker	867 MB	848 MB
kapua/kapua-api	925 MB	905 MB
kapua/kapua-job-engine	892 MB	873 MB
kapua/kapua-broker-artemis	962 MB	943 MB
kapua/kapua-service-authentication	636 MB	716 MB
kapua/kapua-consumer-lifecycle	750 MB	730 MB
kapua/kapua-consumer-telemetry	741 MB	721 MB

The java-base image shrinks of 19 MB, which are saved for each of the Docker container that are using it (all of them).

Related Issue
None

Description of the solution adopted
Replaced JDK 11 package installed from java-11-openjdk to java-11-openjdk-headless

Screenshots
None

Any side note on the changes made
None