[pgjdbc/pgjdbc] aeb6f8: chore: suppress Picked up _JAVA_OPTIONSwarnings

Branch: refs/heads/release/master
  Home:   https://github.com/pgjdbc/pgjdbc
  Commit: aeb6f8aa8bc849091ab3592865692bf4fc06e9f3
      https://github.com/pgjdbc/pgjdbc/commit/aeb6f8aa8bc849091ab3592865692bf4fc06e9f3
  Author: Vladimir Sitnikov <sitnikov.vladimir@gmail.com>
  Date:   2018-07-11 (Wed, 11 Jul 2018)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  chore: suppress Picked up _JAVA_OPTIONS warnings

This results in Javadoc warning during release and it fails the release

See https://github.com/travis-ci/travis-ci/issues/8408



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