synced firealarm web.xml with virtual_firealarm web.xml

modules/samples/firealarm/FireAlarm/api/src/org.wso2.carbon.device.mgt.iot.sample.firealarm.service.impl/src/main/webapp/WEB-INF/web.xml

@@ -51,7 +51,15 @@
     </context-param>
     <context-param>
         <param-name>managed-api-context</param-name>
-        <param-value>/firealarm</param-value>
+		<param-value>/firealarm</param-value>
+	</context-param>
+    <context-param>
+            <param-name>managed-api-context-template</param-name>
+            <param-value>/firealarm/{version}</param-value>
+    </context-param>
+    <context-param>
+            <param-name>managed-api-application</param-name>
+            <param-value>firealarm</param-value>
     </context-param>
     <context-param>
         <param-name>managed-api-isSecured</param-name>