Add missing dependency management for Jetty

See spring-projectsgh-9989

Author: blacelle

spring-boot-dependencies/pom.xml

@@ -1640,6 +1640,11 @@
 				<artifactId>javax-websocket-server-impl</artifactId>
 				<version>${jetty.version}</version>
 			</dependency>
+			<dependency>
+				<groupId>org.eclipse.jetty.websocket</groupId>
+				<artifactId>javax-websocket-client-impl</artifactId>
+				<version>${jetty.version}</version>
+			</dependency>
 			<dependency>
 				<groupId>org.eclipse.jetty.websocket</groupId>
 				<artifactId>websocket-client</artifactId>
@@ -1650,6 +1655,11 @@
 				<artifactId>websocket-server</artifactId>
 				<version>${jetty.version}</version>
 			</dependency>
+			<dependency>
+	            <groupId>org.eclipse.jetty.websocket</groupId>
+	            <artifactId>websocket-servlet</artifactId>
+				<version>${jetty.version}</version>
+			</dependency>
 			<dependency>
 				<groupId>org.ehcache</groupId>
 				<artifactId>ehcache</artifactId>