0025699: Crash while importing STeP file

0025699: Crash while importing STeP file

1) Try-catch block was added on a StepToTopoDS_TranslateEdgeLoop::Init() to
catch Standard_ConstructionError during the Curve conversion.

2) Checks of BSpline curve degree added to prevent construction error when converting edges to BSpline_Curve.
3) Warning message was added in case of incorrect curve definition.

Correct of the test cases according to the new error message added with fix

Conflicts:
	tests/de/step_1/R9

Modified test cases according to new reference data