600ae070fb1697cf4831d44f631db9c5222dfcbc reporting: change series class name to report_series to avoid conflict with control systems toolbox function series

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 205 | PASS: 204 | FAIL: 0 | XFAIL: 1 | XPASS: 0

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 203 | PASS: 202 | FAIL: 0 | XFAIL: 1 | XPASS: 0

A full log can be found on karaba in '/tmp/dynare-master-check-o0r1z78s7x.log'.