org.jboss.jbossfaces.WAR_BUNDLES_JSF_IMPL doesn't work with Mojarra 2.1

I set the context parameter org.jboss.jbossfaces.WAR_BUNDLES_JSF_IMPL in web.xml to true, and added jsf-impl-2.1.3-b02.jar to WEB-INF/lib. But I got the stacktrace below (same stacktrace when jsf-api-2.1.3-b02.jar is added, too). The ear has one ejb and two web modules. One web module for JSF/CDI/RichFaces and one web module for RESTEasy. The strange observation is: the stacktrace occures regarding the web module for RESTEasy.

I tried to add the following line to the <dependencies> section in modules\org\jboss\as\jaxrs\main\module.xml, but this didn't help.
<module name="javax.faces.api"/>

Stacktrace:
07:48:05,399 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-7) MSC00001: Failed to start service jboss.deployment.subunit."swe.ear"."sweREST.war".POST_MODULE: org.jboss.msc.service.StartException in service jboss.deployment.subunit."swe.ear"."sweREST.war".POST_MODULE: Failed to process phase POST_MODULE of subdeployment "sweREST.war" of deployment "swe.ear"
at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:121)
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1765)
at org.jboss.msc.service.ServiceControllerImpl$ClearTCCLTask.run(ServiceControllerImpl.java:2291)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [:1.7.0]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [:1.7.0]
at java.lang.Thread.run(Thread.java:722) [:1.7.0]
Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: java.lang.ClassNotFoundException: javax.faces.webapp.FacetTag from [Module "deployment.swe.ear.sweREST.war:main" from Service Module Loader]
at org.jboss.as.jaxrs.deployment.JaxrsComponentDeployer.deploy(JaxrsComponentDeployer.java:63)
at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:115)
... 5 more
Caused by: java.lang.ClassNotFoundException: javax.faces.webapp.FacetTag from [Module "deployment.swe.ear.sweREST.war:main" from Service Module Loader]
at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:191)
at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:358)
at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:307)
at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:101)
at org.jboss.as.jaxrs.deployment.JaxrsComponentDeployer.deploy(JaxrsComponentDeployer.java:61)
... 6 more