Bump modello model version to 2.0.0
Remove unneeded M2E configuraion
Add assertion about non-null pointer

This silences Eclipse warning about potential null pointer
dereference.
Fix Eclipse formatter settings for annotations
Fix code formatting related to annotation
Revert "Try to replace OSGi system deps"

This reverts commit cf27d2b198af687eef2624e61d95d75da2673add.