Ported to OCCT 7.8.x

[rainman110]

Description

These small changes port TiGL to OpenCASCADE 7.8.

Most changes are cosmetic ones. Only for the hash computation, we cannot use anymore a hash maximum
value, which was probably never a good idea, but it will change the resulting hashes.

This should be no problem, since the hashes are mostly used internally.

How Has This Been Tested?

I just compiled and ran TiGL Viewer successfully.

I hope that the unit test will be successful ... keeping fingers crossed 😏

Screenshots, that help to understand the changes(if applicable):

Checklist:

Task	Finished	Reviewer Approved
At least one test for the new functionality was added.	yes does not apply	OK
New classes have been added to the Python interface.	yes does not apply	OK
The code is properly documented with doxygen docstrings	yes does not apply	OK
Changes are documented at the top of ChangeLog.md	yes does not apply	OK

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 2 lines in your changes missing coverage. Please review.

Project coverage is 69.52%. Comparing base (aaae62f) to head (edf49c8).
Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
src/common/tiglcommonfunctions.cpp	66.66%	1 Missing ⚠️
src/geometry/CTiglIntersectionCalculation.cpp	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1063   +/-   ##
=======================================
  Coverage   69.52%   69.52%           
=======================================
  Files         301      301           
  Lines       26949    26951    +2     
=======================================
+ Hits        18735    18737    +2     
  Misses       8214     8214           

Flag	Coverage Δ
unittests	69.52% <66.66%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/common/tiglcommonfunctions.h	100.00% <ø> (ø)
src/geometry/CTiglBSplineFit.cpp	92.02% <ø> (ø)
src/imports/CTiglStepReader.cpp	90.00% <100.00%> (ø)
src/common/tiglcommonfunctions.cpp	78.25% <66.66%> (+0.03%)	⬆️
src/geometry/CTiglIntersectionCalculation.cpp	88.09% <0.00%> (ø)

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[joergbrech]

Thanks! 💐