Implement bazel support for web context

- add web context to OSGI rules
- build ACL app
- build DHCP app

Change-Id: I03687d109eb44621458ad7269a435e03eec47495
diff --git a/apps/dhcp/BUILD b/apps/dhcp/BUILD
new file mode 100644
index 0000000..dbf2ac4
--- /dev/null
+++ b/apps/dhcp/BUILD
@@ -0,0 +1,11 @@
+BUNDLES = [
+    "//apps/dhcp/api:onos-apps-dhcp-api",
+    "//apps/dhcp/app:onos-apps-dhcp-app",
+]
+
+onos_app(
+    category = "Utility",
+    included_bundles = BUNDLES,
+    title = "DHCP Server",
+    url = "http://onosproject.org",
+)