Fix syntax errors so it matches our style guide.

Each model has a scope which returns the ontologies which have, at least one, entry from each model, e.g. all ontologies which are at least in one project or have one license model, also each model has a method which gives the name of the instance and the number of ontologies which have this attribute, e.g. all ontologies which are in this project XY.

fixed relation for task and ontolgy model and added migration for them

allow management of tasks

validate length on metadata names

add tasks to ontologies