* Update Sample to Spring Integration 2.2.4
* In the sample - disallow unauthenticated Twitter Searches
- As of Twitter API version 1.1, users must be authenticated to perform searches.
For reference see: https://jira.springsource.org/browse/INTSAMPLES-114
* Upgrade Twitter sample to latest Spring Integration version
* Twitter search test does not run with authentication by default
* Twitter search test will run every time the project builds