Switch jetty & tomcat samples to use starter POMs

spring-zero-samples/spring-zero-sample-jetty/pom.xml

@@ -23,19 +23,9 @@
 			<artifactId>spring-webmvc</artifactId>
 		</dependency>
 		<dependency>
-			<groupId>org.eclipse.jetty</groupId>
+			<groupId>${project.groupId}</groupId>
-			<artifactId>jetty-webapp</artifactId>
+			<artifactId>spring-starter-jetty</artifactId>
-			<scope>runtime</scope>
+			<version>${project.version}</version>
-		</dependency>
-		<dependency>
-			<groupId>org.eclipse.jetty</groupId>
-			<artifactId>jetty-util</artifactId>
-			<scope>runtime</scope>
-		</dependency>
-		<dependency>
-			<groupId>javax.servlet</groupId>
-			<artifactId>javax.servlet-api</artifactId>
-			<scope>runtime</scope>
 		</dependency>
 	</dependencies>
 	<build>

spring-zero-samples/spring-zero-sample-tomcat/pom.xml

@@ -19,12 +19,9 @@
 			<version>${project.version}</version>
 		</dependency>
 		<dependency>
-			<groupId>org.apache.tomcat.embed</groupId>
+			<groupId>${project.groupId}</groupId>
-			<artifactId>tomcat-embed-core</artifactId>
+			<artifactId>spring-starter-tomcat</artifactId>
-		</dependency>
+			<version>${project.version}</version>
-		<dependency>
-			<groupId>org.apache.tomcat.embed</groupId>
-			<artifactId>tomcat-embed-logging-juli</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework</groupId>