remove running customfeatures model on WebSphere in server-test-lrg due to hung up issue caused by this model, in order to run this model, you need to set values to "run.jpa.customfeatures.model" property in test.properties.
remove running customfeatures model on WebSphere in server-test-lrg due to hung up issue caused by this model, in order to run this model, you need to set values to "run.jpa.customfeatures.model" property in test.properties.

code reviewed by Edwin Tang.


Former-commit-id: 9420fe6058334c16ed9d77aa631e15863a847469
bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs,bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs,bfg-repo-cleaner-demos/eclipselink.runtime-bfg-strip-big-blobs