Standardize Build

The build now uses spring build conventions to simplify the build

Fixes gh-4284

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

@@ -0,0 +1,16 @@
+apply plugin: 'io.spring.convention.spring-sample-war'
+
+dependencies {
+	compile project(':spring-security-core')
+	compile slf4jDependencies
+	compile 'org.springframework:spring-beans'
+	compile 'org.springframework:spring-web'
+	compile 'org.springframework:spring-webmvc'
+
+	providedCompile 'javax.servlet:javax.servlet-api'
+
+	runtime project(':spring-security-config')
+	runtime project(':spring-security-taglibs')
+	runtime project(':spring-security-web')
+	runtime jstlDependencies
+}