Merge branch 'conventions_mf_correlated_field' into 'NIFTy_5'

Remove exp from multifrequency correlated field

See merge request ift/nifty-dev!107

nifty5/library/correlated_fields.py

@@ -25,7 +25,6 @@ from ..operators.contraction_operator import ContractionOperator
 from ..operators.distributors import PowerDistributor
 from ..operators.harmonic_operators import HarmonicTransformOperator
 from ..operators.simple_linear_operators import FieldAdapter
-from ..sugar import exp
 
 
 def CorrelatedField(s_space, amplitude_model):
@@ -72,4 +71,4 @@ def MfCorrelatedField(s_space_spatial, s_space_energy, amplitude_model_spatial,
     a_energy = dom_distr_energy(amplitude_model_energy)
     a = a_spatial*a_energy
     A = pd(a)
-    return exp(ht(A*FieldAdapter(MultiDomain.make({"xi": h_space}), "xi")))
+    return ht(A*FieldAdapter(MultiDomain.make({"xi": h_space}), "xi"))