implement API oms_replaceSubModel()

[arun3688]

Related Issues

https://github.com/OpenModelica/OMSimulator/issues/1169

Purpose

This PR implements a new API oms_replaceSubModel() which replaces an existing fmu with the new one, but keeps the connections if the replaced fmu has the same properties with the old fmus which should support the architectural modelling in OMSimulator

TODO

• [x] add API oms_replaceSubModel()
• [x] add test cases
• [x] check the replaced component in ssv and ssm files
• [x] add python support
• [x] add documentation

[lochel]

Please preserve higher level definitions from the ssp file.