OpenImageIOReader : Remove max_errors_per_file limit
OpenImageIOReader : Remove max_errors_per_file limit

This was causing test failures in ImageReaderTest.testMissingFrameMode, because the error message was being omitted from the exceptions thrown.

ImageEngine/gaffer,appleseedhq/gaffer,hradec/gaffer,ImageEngine/gaffer,andrewkaufman/gaffer,hradec/gaffer,johnhaddon/gaffer,johnhaddon/gaffer,lucienfostier/gaffer,ivanimanishi/gaffer,andrewkaufman/gaffer,GafferHQ/gaffer,GafferHQ/gaffer,boberfly/gaffer,ImageEngine/gaffer,lucienfostier/gaffer,andrewkaufman/gaffer,lucienfostier/gaffer,appleseedhq/gaffer,andrewkaufman/gaffer,boberfly/gaffer,GafferHQ/gaffer,ImageEngine/gaffer,lucienfostier/gaffer,GafferHQ/gaffer,GafferHQ/gaffer,boberfly/gaffer,boberfly/gaffer,johnhaddon/gaffer,ivanimanishi/gaffer,andrewkaufman/gaffer,johnhaddon/gaffer,ivanimanishi/gaffer,johnhaddon/gaffer,hradec/gaffer,hradec/gaffer,appleseedhq/gaffer,hradec/gaffer,appleseedhq/gaffer,ivanimanishi/gaffer