Standardize Build

The build now uses spring build conventions to simplify the build

Fixes gh-4284

samples/xml/preauth/preauth.gradle

@@ -1,32 +0,0 @@
-// Preauth sample build file
-
-apply plugin: 'war'
-apply plugin: 'jetty'
-
-war.baseName = "sample"
-
-def excludeModules = ['jsr250-api', 'ehcache', 'spring-jdbc', 'spring-tx']
-
-configurations {
-	excludeModules.each {name ->
-		runtime.exclude module: name
-	}
-
-	runtime.exclude group: 'org.aspectj'
-}
-
-dependencies {
-	providedCompile "javax.servlet:javax.servlet-api:3.0.1"
-
-	runtime project(':spring-security-web'),
-			project(':spring-security-config'),
-			"org.slf4j:jcl-over-slf4j:$slf4jVersion",
-			"ch.qos.logback:logback-classic:$logbackVersion"
-
-	testCompile project(':spring-security-web'),
-			project(':spring-security-config')
-}
-
-jettyRun {
-	userRealms = [jettyRun.class.classLoader.loadClass('org.mortbay.jetty.security.HashUserRealm').newInstance('Preauth Realm', "$projectDir/realm.properties")]
-}

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')]
+//}