[artifactory-release] Release version Java DSL 1.0.0.M2
[artifactory-release] Next development version Java DSL
INTEXT-107 Upgrade to Spring Integration 4.0

JIRA: https://jira.spring.io/browse/INTEXT-107

* Upgrade to Gradle 1.12
* Fix compile warnings
* Fix XSD declaration
* Get rid of `EasyMock`