Java 1.7 is EOL, and the official ES 1.4 documentation suggests using Java 1.8 - I therefore propose that we move to 1.8 in AWS. Any objections? :)  https://www.elastic.co/guide/en/elasticsearch/reference/1.4/_installation.html  http://www.oracle.com/technetwork/java/eol-135779.html
No objections from me, this is the only Socorro-related service that uses Java AFAIK so should be fine to upgrade.
Splendid. I've got this wrapped into the upcoming ES PR.
Resolved in #132 (above).