JIRA: https://jira.spring.io/browse/INT-3403
* Upgrade to Gradle 1.12
* Make `schemaZip` Windows compatible
INT-3403: Fix the `replaceAll` logic
INT-3403: Apply SS & SWS releases
* Add to `LongRunningIntegrationTest` ability to read `System.properties`
Note, ENV property 'RUN_LONG_INTEGRATION_TESTS' has a preference in case of value `true`
* Add Gradle task `testAll`
* Upgrade to Gradle 1.7
* Improve build performance by adding 'inputs'/'outputs' to some tasks
JIRA: https://jira.springsource.org/browse/INT-3155
Polishing
Remove inputs/outputs.
Polish RouterConcurrencyTest.
.gradle scripts once in gradle/ dir now live in shared buildSrc/ dir.
Some hard-coding of Spring Integration specifics still remain and will
be removed shortly.