ibrdtn: Fixing tests for extension block and serializer
ibrdtn: Clean-up of SDNV code
ibrdtn: Change the return values of the Dictionary

Now the Dictionary returns and accepts SDNV object directly. Additionally
the dictionary will throw an exception if a values requested by get(std::string)
is not in there.
ibrdtn: Improving TestExtensionBlock with debug output and exception catching
daemon: Initialize the BLOB mechanism when unit testing the storages