Updated .travis.yml: disable sudo so we can use the new docker travis infrastructure and now test against node v4 after the merge of node.js and io.js.
Updated .travis.yml: disable sudo so we can use the new docker travis infrastructure and now test against node v4 after the merge of node.js and io.js.

jembi/openhim-core-js,jembi/openhim-core-js