SW-164: ensured that the meta-rpm-package triggeremailservice is created by including an empty __init__.py file

SW-164: ensured that the meta-rpm-package momqueryservice is created by including an empty __init__.py file

SW-164: added initial simple use of cpack which generates an rpm package file per lofar package. No dependencies between rpm packages yet.

Task LSMR-20: Added an initial script that migrates projects (as projects) and related observations and pipelines (as tasks) from mom to lsmr. Still incomplete.

Task LSMR-23: Added remakemigrations.py script to conveniently remake migrations from scratch without manual action for subversion and choice population

Task LSMR-23: Added lsmr_makemigrations command to conveniently remake migrations from scratch without manual action for subversion and choice population

Task LSMR-14: Added missing properties and altered relation attributes to match the current spec by the architect

LSMR-14: implemented (semi)static choices with foreignkeys and automatic population of the inital database.

models/serializers/viewsets

Task LSMR-13: fixed work io roles and added test coverage, renamed request relation template according to input by JDM

Task LSMR-13: Implemented template models and added a basic rest viewset for GeneratorTemplate. Postgres-specifics are commented out until the test setup can handle that.