Update the artifactId for java-servlet 3.1.0

Signed-off-by: Rui Chen <chenrui333@gmail.com>

Author: chenrui333

toolkit/pom.xml

@@ -60,7 +60,7 @@
 		<!-- httprequest and httpresponse -->
 		<dependency>
 			<groupId>javax.servlet</groupId>
-			<artifactId>servlet-api</artifactId>
+			<artifactId>javax.servlet-api</artifactId>
 			<version>3.1.0</version>
 			<scope>provided</scope>
 		</dependency>