Create test case that reads timeseries from ESDL

[FJanssen-TNO]

In the latest PYESDL version, we can write profiles in the esdl. For instance, inpt demand profile can be read and parsed from the esdl while in the past we were able to read the input demand profiles only from input csv or database.

TODO:

• Create a test that we can correctly read the input heat demand profile from esdl.