Update JRE versions, remove Debian Jessie support

[frantsao]

Prerequisites

• Put an X between the brackets on this line if you have done all of the following:
  • Checked that your issue isn't already filled: https://github.com/issues?utf8=✓&q=is%3Aissue+user%3Aidealista
  • Checked that there is not already provided the described functionality

Description

Some JRE versions are outdated, causing travis test failing. They must be updated.
Debian Jessie is out of support, configurations must be removed.

Versions

5.2.0