Changes

Fix SEC generation with nested dynamic SECs

BaSyx is stupid ... :/

In BaSyx you have several options how to add elements to a submodel
element collection. The option which the code generator uses doesn't
work when you add dynamic SECs to another SEC. That's because BaSyx is
doing some transformations on the Collection<ISubmodelElement> we're
passing into the setValue() method and these transformations trip over
BaSyx' very own lambda handler feature.

What this change does is replace the call to
.setValue(Collection<ISubmodelElement>) with a call to
.setElements(Map<String, Object>), which doesn't do any transformations.
The collection is manually converted into a Map<String, Object>.

Change-Id: I448bdcb7193562a779f24cf502f09c52daf1416d
Signed-off-by: Moritz Marseu <moritz.marseu@festo.com>