Test parse rules are improved to recognize messages with word 'fail' or 'failure' as errors.
Test cases are corrected accordingly (TODO or REQUIRED statements added where fail messages were not noticed previously).
Generation of 3D-steps shorter than 3D tolerance has been allowed in the fix to build Walking-line.
Now, 3D-step is limited by Precision::Confusion value.
Modifications:
1.Test cases
2. locate_data_file from DrawResources/TestCommands.tcl
Fix for mesh end
Adjusting testing cases for current state of master using new organization of data files
