loadfiles integration tests sometimes abort

[nemanja-boric-sociomantic]

It happens very rarely, but it still happens: travis segfaults the test-loadfiles test. It could be just the unhandled exception, but we have no core dumps available.

[turtle    ] Early termination from '/home/travis/build/sociomantic-tsunami/dmqnode/build/devel/tmp/sandbox-dmqnode-XX465ntE/bin/dmqnode --config=etc/config.ini', aborting.
Aborted (core dumped)
submodules/makd/Makd.mak:651: recipe for target '/home/travis/build/sociomantic-tsunami/dmqnode/build/devel/tmp/test-loadfiles.stamp' failed
make: *** [/home/travis/build/sociomantic-tsunami/dmqnode/build/devel/tmp/test-loadfiles.stamp] Error 134
make: *** Waiting for unfinished jobs....```