Test trusty

Author: pgleeson

.travis.yml

@@ -1,5 +1,14 @@
+dist: trusty
+sudo: false
+
 language: java
 
+jdk:
+  - openjdk7
+  - openjdk8
+  - oraclejdk8
+  # - oraclejdk9
+
 install:
     - export main_repo_branch=$TRAVIS_BRANCH
     - git clone https://github.com/NeuroML/org.neuroml.model.injectingplugin.git