Task #10975: Sem_t sem_timedwait: attempt to fix build error on OS X: just ifdef out this function and its sub-test

Task #9893: MessageRouter: remove cobalt.task.specification.system from rule: the queue is not defined elsewhere. I don't remember why I added it 6 months ago, but likely for piggy-backing, which will happen without a new routing rule. Also delete obsolete build_queues.sh (we use populateDB.sh instead). Requested by Jan David Mol.

Task #10099: COBALT outputproc PVSS: adjust to new PVSSDatapointDefs.h supplied by Arthur Coolen. Write storage hostnames instead of number. This should restore PVSS OutputProc support for CEP4 and DRAGNET, but is hard to fully verify.

Task #10695: Removed Observation.Scheduler.taskDuration, added a timestamp parser function to PyCommon, and do not silently fail on unparsable startTime/stopTime in paret.

Task #9304: Add module to determine Cobalt block configuration (cherry-picked files from task branch to avoid svn hell)

Task #10473: Use <packagename> <subdir> when specifying packages with a different name and directory

Task #9939: outputProc takes responsibility for data products for locations in the parset that match the hostnames for *all* interfaces (and localhost) on a COBALT storage host. This fixes an issue with DRAGNET hostnames.

Fix merge conflict on momqueryservice.py. Moved on trunk, but changed on this branch.
Solve by replacing the moved file with the changed file (thus, move the changed file over the moved file).
Careful checking of (JD's) changes shows this is correct; the changes are preserved.
Other moved files did not cause conflicts, since they were not changed.

Task #10275: Cranked up the code-coverage of the unittests from 76% to 91% by adding some bad case scenarios.

Task #9893: Bugfixes in communication Messaging -> MessageBus for mom.importxml, added override to apply LOFARENV in caller for compatibility.

There's a good reason for doing this, because some things have changed in the
meantime:
- Binaries are now always built in <CMAKE_BINARY_DIR>/bin.
- Configuration files are now always symlinked in <CMAKE_BINARY_DIR>/etc

The ConfigLocator searches the following default locations:
  ${LOFARROOT}, ${LOFARROOT}/etc, /opt/lofar, /opt/lofar/etc

If it doesn't find the configuration file in any of these directories, it will
also search the following directories:
  <BIN_DIR>, <BIN_DIR>/etc, <BIN_DIR>/.., <BIN_DIR>/../etc,
where <BIN_DIR> is the directory containing the executable.

And here's the problem. In the old days, the binary would be somewhere in the
build tree, in a location similar to its source. But now it's in
<CMAKE_BINARY_DIR>/bin. The extended search rule above will *always* find the
configuration file in <CMAKE_BINARY_DIR>/etc; there's no way you can override
this anymore. (Well, you could use the very dirty hack to redefine LOFARROOT
in your test, but that's plain ugly.)

So, by reintroducing the current directory in BASE_SEARCH_DIR, we now have
again the option to use a different configuration file for testing.