SEC-2857: Update to Gradle 2.3

build.gradle

@@ -164,7 +164,3 @@ artifacts {
     archives project(':docs').docsZip
     archives project(':docs').schemaZip
 }
-
-task wrapper(type: Wrapper) {
-    gradleVersion = '1.12'
-}

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=http\://services.gradle.org/distributions/gradle-2.2.1-all.zip
+distributionUrl=http\://services.gradle.org/distributions/gradle-2.3-all.zip