[KARAF-2119] Upgrade to pax.base 1.4 (and fix itests by it)

Signed-off-by: Andreas Pieber <anpieber@gmail.com>

git-svn-id: https://svn.apache.org/repos/asf/karaf/trunk@1435495 13f79535-47bb-0310-9956-ffa450edef68