Enabling REST API and swagger docs for apps with no resources folder

Change-Id: Ic35d178785e87f496bdcb425269c970758b5c516
diff --git a/apps/packet-stats/web/src/main/java/org/onosproject/packetstats/rest/PacketStatsWebResource.java b/apps/packet-stats/web/src/main/java/org/onosproject/packetstats/rest/PacketStatsWebResource.java
index a6bf190..3f62650 100644
--- a/apps/packet-stats/web/src/main/java/org/onosproject/packetstats/rest/PacketStatsWebResource.java
+++ b/apps/packet-stats/web/src/main/java/org/onosproject/packetstats/rest/PacketStatsWebResource.java
@@ -30,6 +30,7 @@
 /**
  * Packet Stats REST API.
  */
+@Path("")
 public class PacketStatsWebResource extends AbstractWebResource {
     private final ObjectMapper mapper = new ObjectMapper();
     private static final String METRIC_NAME = null;
diff --git a/tools/build/bazel/osgi_java_library.bzl b/tools/build/bazel/osgi_java_library.bzl
index e5065f7..571e3c3 100644
--- a/tools/build/bazel/osgi_java_library.bzl
+++ b/tools/build/bazel/osgi_java_library.bzl
@@ -451,7 +451,7 @@
     native_srcs = srcs
     native_resources = resources
 
-    if web_context != None and api_title != "" and len(resources) != 0:
+    if web_context != None and api_title != "":
         # generate Swagger files if needed
         _swagger_java(
             name = name + "_swagger_java",