AMQP-293 - Upgrade Gradle Wrapper to 1.4
For reference see https://jira.springsource.org/browse/AMQP-293
Merge pull request #79 from ghillert/AMQP-293

* AMQP-293:
  AMQP-293 - Upgrade Gradle Wrapper to 1.4 For reference see https://jira.springsource.org/browse/AMQP-293