[FELIX-4475] Improve logging in FileInstall

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1583667 13f79535-47bb-0310-9956-ffa450edef68
[FELIX-4472] Various concurrency issues in fileinstall

git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1583668 13f79535-47bb-0310-9956-ffa450edef68