This commit improves the gvaweb celery worker setup based on the work
that has been done for gvaldap before. Old files have been removed and
the setup uses the macros from gnuviechadmin/gvaapp_macros.sls.
Celery has problems when non-ASCII characters are included in log messages
(i.e. from called system commands). Therefore environment variables that
influence the locale setting are reset before running the celery worker.
The documentation build uses sphinxcontrib-blockdiag to build block
diagrams. The pillow package needed by this packaged requires
libjpeg-dev for compilation.
This commit refactors to gnuviechadmin.base state by moving the Django
specific parts into gnuviechadmin.django that is now used by
gnuviechadmin.gvaldap and gnuviechadmin.webinterface. The script
templates gnuviechadmin/gvafile/run_celery.sh and
gnuviechadmin/gvafile/settings.sh have been added.