Add back spring-cloud-function-web (faster startup)

With this change there are now 2 choices for web endpoints. The
stream servlet binder is useful for multi-binder use cases
(e.g. HTTP -> message broker).

spring-cloud-function-dependencies/pom.xml

@@ -70,6 +70,11 @@
 				<artifactId>spring-cloud-function-adapter-openwhisk</artifactId>
 				<version>${project.version}</version>
 			</dependency>
+			<dependency>
+				<groupId>org.springframework.cloud</groupId>
+				<artifactId>spring-cloud-stream-binder-servlet</artifactId>
+				<version>${project.version}</version>
+			</dependency>
 		</dependencies>
 	</dependencyManagement>
 	<profiles>