Update samples with Gradle configuration to align with new plugin

spring-boot-samples/spring-boot-sample-web-ui/build.gradle

@@ -17,20 +17,11 @@ buildscript {
 	}
 }
 
-
 apply plugin: 'java'
-apply plugin: 'eclipse'
-apply plugin: 'idea'
 apply plugin: 'org.springframework.boot'
+apply plugin: 'io.spring.dependency-management'
 
-springBoot {
-    classifier = 'exec'
-}
-
-jar {
-	baseName = 'spring-boot-sample-web-ui'
-	version =  '0.0.0'
-}
+version = springBootVersion
 
 repositories {
 	// NOTE: You should declare only repositories that you need here
@@ -46,5 +37,3 @@ dependencies {
 	compile("org.hibernate:hibernate-validator")
 	testCompile("org.springframework.boot:spring-boot-starter-test")
 }
-
-task wrapper(type: Wrapper) { gradleVersion = '1.6' }