TST: update test case for dwt/idwt axis to use complex data
TST: update test case for dwt/idwt axis to use complex data

rgommers/pywt,PyWavelets/pywt,michelp/pywt,michelp/pywt,PyWavelets/pywt,eriol/pywt,grlee77/pywt,michelp/pywt,rgommers/pywt,eriol/pywt,eriol/pywt,rgommers/pywt,grlee77/pywt,rgommers/pywt