cacerts issue during Docker build on ppc64 & arm

[nicobo]

/usr/bin/head: cannot open '/etc/ssl/certs/java/cacerts' for reading: No such file or directory

See the following issues :

• https://github.com/AdoptOpenJDK/openjdk-installer/issues/105
• https://bugs.launchpad.net/ubuntu/+source/ca-certificates-java/+bug/1396760