Fix: make dzil test work

dzil test failed with an error about missing TestRunner plugins.
To amend that, the [MakeMaker] directive was added to "dist.ini".
The downside is that a Makefile.PL is generated and distributed with the tar archive,
too, which can be a bit misleading. A user not familiar with this software might
feel invited to use "make; make test; make install" to install it, which
is not the way it is designed (at least not yet). This software is, so far,
meant to be installed manually by extracting the tar archive (and reloading or
restarting the backend if that part of the code was changed).

[TestRelease] was added to dist.ini, too, so that the code tests are
run before a release is actually done.
Merge branch 'master' of /home/knutzehe/NetspocWeb
Fix: clear network resources on owner change

As long as the first network was selected automatically,
there was no need for this to be done. When that selection
was no longer done, it was simply forgotten to take the appropriate
measures for the network resources grid, too.
Fix double calls to get_policy and service_list

These changes fix issue nr 4 and 5 in the github repository:
 - 4: Duplicate calls to backend, when changing owner
 - 5: Wrong service list when changing owner while search tab is active
Merge branch 'master' of https://github.com/hknutzen/Netspoc-Web