Standardize Build

The build now uses spring build conventions to simplify the build

Fixes gh-4284

samples/javaconfig/data/spring-security-samples-javaconfig-data.gradle

@@ -0,0 +1,12 @@
+apply plugin: 'io.spring.convention.spring-sample'
+
+dependencies {
+	compile project(':spring-security-config')
+	compile project(':spring-security-data')
+	compile 'javax.validation:validation-api'
+	compile 'org.eclipse.persistence:javax.persistence'
+	compile 'org.hibernate:hibernate-entitymanager'
+	compile 'org.hibernate:hibernate-validator'
+	compile 'org.hsqldb:hsqldb'
+	compile 'org.springframework.data:spring-data-jpa'
+}