Updated the check for missing stubs so as not to require InterfacePart implementations to provide a stub if ImplementationWithStubPart has been inherited.
Removed model checker errors and some warnings from the samples
Rebuilt samples
Updated the smodel sample
Merge branch '3.2/vaclavFixes' into 3.2/vaclavMerge

Conflicts:
	samples/sampleJavaExtensions/languages/SampleExtensions/source_gen/org/jetbrains/mps/samples/IfAndUnless/editor/trace.info
Rebuilt
Re-enabled the failing smodel samples
Updated the imple. stripping test build script to reflect recent changes in reexport flags.
Merge remote-tracking branch 'origin/master' into 3.2/vaclavMerge
Merge remote-tracking branch 'origin/master' into 3.2/vaclavMerge
MPS-21082 Somehow got it in the log
Rebuilt j.m.ide.build
rebuilding build scripts
Merge remote-tracking branch 'origin/master' into 3.2/vaclavMerge