Standardize Build

The build now uses spring build conventions to simplify the build

Fixes gh-4284

samples/xml/servletapi/servletapi.gradle

@@ -1,34 +0,0 @@
-// Servlet API integration sample build file
-
-apply plugin: 'war'
-
-def excludeModules = ['spring-security-acl', '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:$servletApiVersion"
-
-	compile project(':spring-security-core'),
-			project(':spring-security-web'),
-			"javax.servlet.jsp.jstl:javax.servlet.jsp.jstl-api:$jstlVersion",
-			"org.springframework:spring-beans:$springVersion",
-			"org.springframework:spring-context:$springVersion",
-			"org.springframework:spring-web:$springVersion",
-			"org.springframework:spring-webmvc:$springVersion"
-
-	runtime project(':spring-security-config'),
-			project(':spring-security-taglibs'),
-			"org.springframework:spring-context-support:$springVersion",
-			jstlDependencies,
-			"org.slf4j:jcl-over-slf4j:$slf4jVersion",
-			"ch.qos.logback:logback-classic:$logbackVersion"
-}
-
-eclipse.wtp.component.contextPath = "servletapi"

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

@@ -0,0 +1,21 @@
+apply plugin: 'io.spring.convention.spring-sample-war'
+
+dependencies {
+	compile project(':spring-security-core')
+	compile project(':spring-security-web')
+	compile 'javax.servlet.jsp.jstl:javax.servlet.jsp.jstl-api'
+	compile 'org.springframework:spring-beans'
+	compile 'org.springframework:spring-context'
+	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 jstlDependencies
+	runtime slf4jDependencies
+	runtime 'org.springframework:spring-context-support'
+}
+
+eclipse.wtp.component.contextPath = 'servletapi'