Refactors Modelprovider tests to test for correct Exception behavior

Refactors all tests in regression.vab.modelprovider to test for the correct throwing of ProviderExceptions
Refactors FileSystemProvider, ContainerPropertyProvider, VABModelProvider to throw the correct ProviderExceptions
Fixes all other tests and classes affected by the changes listed above

Change-Id: I09dfd69c339d06132fb4d3ed044dc27891de2a8e
Signed-off-by: Maximilian Conradi <maximilian.conradi@iese.fraunhofer.de>
33 files changed