Fix misconfiguration in new BSA service (#2227)

Also add dependency locking to services:bsa

core/src/main/java/google/registry/env/common/bsa/WEB-INF/web.xml

@@ -15,8 +15,8 @@
 
   <!-- Test action -->
   <servlet-mapping>
-    <servlet-name>backend-servlet</servlet-name>
-    <url-pattern>/_dr/task/bsa</url-pattern>
+    <servlet-name>bsa-servlet</servlet-name>
+    <url-pattern>/_dr/task/bsaDownload</url-pattern>
   </servlet-mapping>
 
   <!-- Security config -->