RESTEasy module/classes are being used in my JAX-RS application even after excluding RESTEasy from the deployment in JBoss EAP 6

Issue

• I'd like to use Jersey as my application's JAX-RS implementation. To accomplish this task, I have followed the directions from this knowledgebase solution.

We also have another deployment that is choosing to use RESTEasy. Before the RESTEasy application has been invoked for the first time, the Jersey application works as expected, but after the first invocation of the RESTEasy application, Jersey tries to use the UriBuilderImpl class from RESTEasy instead of jersey-bundle-1.2.jar.

Below is the exception that I am running into that exposes that RESTEasy classes are being used:

java.lang.IllegalArgumentException: You did not supply enough values to fill path parameters
    org.jboss.resteasy.specimpl.UriBuilderImpl.buildFromValues(UriBuilderImpl.java:546)
    org.jboss.resteasy.specimpl.UriBuilderImpl.build(UriBuilderImpl.java:539)
    com.redhat.gss.jaxrs.SomeFilter.filter(AccessStatisticFilter.java:108)
    com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:258)
    com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:133)
    com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:83)
    com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:133)
    com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:71)
    com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:996)
    com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:947)
    com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:938)
    com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:399)
    com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:478)
    com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:663)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:847)

• We are trying to use CXF as our JAX-RS implementation, but we are facing ClassCastException when running our application:

java.lang.ClassCastException: org.jboss.resteasy.core.ServerResponse cannot be cast to org.apache.cxf.jaxrs.impl.ResponseImpl

• How do we replace RESTEasy with a different or newer version of an implementation of JAX-RS?

• How to replace Rest easy API. For one project we need to replace the Rest easy API from JBOSS by http://sourceforge.net/projects/resteasy/files/Resteasy%20JAX-RS/3.0.9.Final/. Is this supported or does this modification void the support contract ?