Upgrade to SF 4.3.15.RELEASE

Author: garyrussell

build.gradle

@@ -136,7 +136,7 @@ subprojects { subproject ->
 		springSecurityVersion = '4.1.4.RELEASE'
 		springSocialTwitterVersion = '1.1.2.RELEASE'
 		springRetryVersion = '1.1.3.RELEASE'
-		springVersion = project.hasProperty('springVersion') ? project.springVersion : '4.3.15.BUILD-SNAPSHOT'
+		springVersion = project.hasProperty('springVersion') ? project.springVersion : '4.3.15.RELEASE'
 		springWsVersion = '2.3.0.RELEASE'
 		xmlUnitVersion = '1.6'
 		xstreamVersion = '1.4.7'