CCDCesque: None as test_indices is parsed incorrectly

[ceholden]

If user doesn't override test_indices keyword argument, then CCDCesque should use all bands input to fit. There is a logical error in the parsing because self.test_indices is parsed using np.asarray so self.test_indices is None is always False.

if self.test_indices is None:
    self.test_indices = np.arange(self.n_series)

should be

if not np.any(np.asarray(self.test_indices)):
    self.test_indices = np.arange(self.n_series)