Rounding errors in final time give warning in BuildingsPy

[mwetter]

Running ../bin/runUnitTests.py -t optimica gives output that includes

*** Warning: While processing file Buildings_Fluid_Geothermal_Borefields_BaseClasses_HeatTransfer_ThermalResponseFactors_Validation_GFunction_100boreholes_result.mat for variable gFun_int: different end time between reference and test data.
tNew = [0.0, 370000000000.0]
tOld = [0.0, 370000003072.0]

*** Warning: While processing file Buildings_Fluid_Geothermal_Borefields_BaseClasses_HeatTransfer_ThermalResponseFactors_Validation_GFunction_SmallScaleValidation_result.mat for variable gFun_int: different end time between reference and test data.
tNew = [0.0, 1800000000000.0]
tOld = [0.0, 1799999979520.0]

This issue is to avoid such rounding errors.

[mwetter]

This issue should also correct the code that leads to

*** Warning: While processing file Buildings_Utilities_IO_Files_Examples_CSVReader_result.mat for variable cos.y: funnel binary status code is: 1.
Reference and test data minimum x values are different.

assuming this is also caused by a rounding error.