karaf-2190, karaf-2192: this fixes the wrapper test and obr tests on faster machines, it was failing with CommandNotFoundExceptions because the features had not finished installing before the commands were being executed

git-svn-id: https://svn.apache.org/repos/asf/karaf/branches/karaf-2.3.x@1446783 13f79535-47bb-0310-9956-ffa450edef68