Standardize Build

The build now uses spring build conventions to simplify the build

Fixes gh-4284

samples/xml/preauth/spring-security-samples-xml-preauth.gradle

@@ -0,0 +1,16 @@
+apply plugin: 'io.spring.convention.spring-sample-war'
+
+dependencies {
+	providedCompile 'javax.servlet:javax.servlet-api'
+
+	runtime project(':spring-security-config')
+	runtime project(':spring-security-web')
+	runtime slf4jDependencies
+
+	testCompile project(':spring-security-config')
+	testCompile project(':spring-security-web')
+}
+
+//jettyRun {
+//	userRealms = [jettyRun.class.classLoader.loadClass('org.mortbay.jetty.security.HashUserRealm').newInstance('Preauth Realm' '$projectDir/realm.properties')]
+//}