support directory based format for mps projects in FileMPSProject
open core project instead of PreloadAllModules
add lost modules to main mps project
regenerate required models
fix NPE in CheckProjectStructure
simplify ParameterizedMpsTest
migrations for OpenAPI classes as method parameters
fix problem with refs migrated from core to lib solutions (webr migration)
fix old signature of removeReference to allow correct refactor
temporary return preload all modules to CheckProjectStructure
Merge branch '3.0/ttim/check_project_structure_rework'