tests: Added Hadoop log dir to log archive in cronjob.
tests: Removed double bracktes from if statements in hadoop test.
packaging: Moved UUID generating from package-specific post install routines into the general postinstall_setup.sh script.

This was necessary to simplify the support for build_root.
packaging: Removed unused variables in RPM and DEB package specification after changes in revision  22452003bf45.
client: Made "fuse" an optional dependency. Do not compile mount.xtreemfs if "fuse" was not found.

Necessary for compiling the client under build_root.
packaging: Moved generation of init.d scripts from script, which generates the source tarball, to the install-server target in the global Makefile.

Necessary for build_root support.
packaging: Removed build-service/xtreemfs-check-packages because they are no longer needed.

It was planed to generate "check packages" which would try to install the regular packages for each distribution and run a minimal test set.

We have implemented the same functionality using VirtualBox and some bash magic on a local machine. Therefore, these check-packages are no longer necessary.
client: Added missing include for stdint.h.

Fixes compilation under buildroot.