Generic trace addon does not deal with several primitive ecore types such as EShort, EByte, ...

For my simulation ([Logo](https://github.com/dvojtise/mde-crashcourse-logo/tree/master/part3-mmfirst-solution)) I need to code some attributes using EDouble in order to have correct precision in the simulation.

When enabling the generic trace addon, it fails with various messages (going from null pointer to 'no null' constraint is violated)

When analysing the error I looked into GenericTraceConstructor class which apparently does not deal with various Ecore primitive type such as EDouble

for example: [getGenericValue](https://github.com/eclipse/gemoc-studio-modeldebugging/blob/1c1667329c0c999f82e9e9f3e090ce591f129763/trace/generator/plugins/org.eclipse.gemoc.trace.gemoc/src/org/eclipse/gemoc/trace/gemoc/traceaddon/GenericTraceConstructor.java#L104) or [addNewObjectToState](https://github.com/eclipse/gemoc-studio-modeldebugging/blob/1c1667329c0c999f82e9e9f3e090ce591f129763/trace/generator/plugins/org.eclipse.gemoc.trace.gemoc/src/org/eclipse/gemoc/trace/gemoc/traceaddon/GenericTraceConstructor.java#L168)