Initialize items of type hippo:webresourcebundle are not processed when an end project uses JRebel

When an end project uses JRebel, the hippo:webresourcebundle initialize items are not processed.

Steps to reproduce:
1. create a 7.10 archetype project
2. build it using JRebel:
mvn clean install -Djrebel
3. run it using JRebel:
mvn -Pcargo.run -Djrebel

Expected: The site looks good. The node /webresources/myhippoproject exists, with several child nodes (css, js, etc.).
Actual: The site looks bad (no CSS). The node /webresources has no child nodes.