Set Default Spring IO to 1.1.5.RELEASE

Fixes gh-4008

build.gradle

@@ -100,7 +100,7 @@ configure(coreModuleProjects) {
     apply plugin: 'emma'
     apply plugin: 'spring-io'
 
-    ext.springIoVersion = project.hasProperty('platformVersion') ? platformVersion : 'latest.integration'
+    ext.springIoVersion = project.hasProperty('platformVersion') ? platformVersion : '1.1.5.RELEASE'
 
     configurations {
         jacoco //Configuration Group used by Sonar to provide Code Coverage using JaCoCo