repo-install-test: fix ca-certificates-java error

The repo-install-test started to fail on debian 10 with the following
error. Apparently this happens when installing ca-certificates-java
after installing java. Add a workaround.

  Setting up ca-certificates-java (20190405) ...
  head: cannot open '/etc/ssl/certs/java/cacerts' for reading: No such file or directory
  Exception in thread "main" java.lang.InternalError: Error loading java.security file

Change-Id: I00b9c97d9d85fb37ba33a48caa732cd50de99683
1 file changed