added javax.servlet-api dependency needed by jackrabbit

main/jackrabbit-filesystem-adapter/pom.xml

@@ -30,6 +30,11 @@
 		</dependency>
 
 		<!-- Jackrabbit -->
+		<dependency>
+			<groupId>javax.servlet</groupId>
+			<artifactId>javax.servlet-api</artifactId>
+			<version>3.1.0</version>
+		</dependency>
 		<dependency>
 			<groupId>org.apache.jackrabbit</groupId>
 			<artifactId>jackrabbit-webdav</artifactId>