Fix Lattice2 failing to load when no Lattice v1 is installed

Due to me mistakenly importing lattice1 modules by forgetting to put in
number 2.

lattice2Common.py

@@ -22,7 +22,7 @@
 #***************************************************************************
 
 import FreeCAD, Part
-from latticeExecuter import CancelError
+from lattice2Executer import CancelError
 if FreeCAD.GuiUp:
     import FreeCADGui
     from PySide import QtCore, QtGui

lattice2MakeCompound.py

@@ -27,7 +27,7 @@ __url__ = ""
 __doc__ = "Mirror of Part MakeCompound command"
 
 from lattice2Common import *
-from latticeBaseFeature import isObjectLattice
+from lattice2BaseFeature import isObjectLattice
 import lattice2Executer
 
 class _CommandLatticeMakeCompound:

lattice2ParaSeries.py

@@ -159,7 +159,7 @@ class LatticeParaSeries(lattice2BaseFeature.LatticeFeature):
                     shape = None
                     for obj in doc2.Objects:
                         if 'Invalid' in obj.State:
-                            latticeExecuter.error(obj,"Recomputing shape for parameter value of "+val+" failed.")
+                            lattice2Executer.error(obj,"Recomputing shape for parameter value of "+val+" failed.")
                             
                             scale = 1.0
                             try:

lattice2PopulateCopies.py

@@ -61,7 +61,7 @@ def DereferenceArray(obj,placements, lnkFrom, refmode):
         elif len(placementsFrom) == len(placements):
             return [lattice2BaseFeature.makeMoveFromTo(placementsFrom[i], placements[i]) for i in range(0, len(placements))]
         else:
-            latticeExecuter.warning(obj,"Lengths of arrays linked as PlacementsTo and PlacementsFrom must equal, or PlacementsFrom can be one placement. Violation: lengths are "+str(len(placements))+ " and "+str(len(placementsFrom)))
+            lattice2Executer.warning(obj,"Lengths of arrays linked as PlacementsTo and PlacementsFrom must equal, or PlacementsFrom can be one placement. Violation: lengths are "+str(len(placements))+ " and "+str(len(placementsFrom)))
     else:
         raise ValueError("Referencing mode not implemented: "+refmode)
     

lattice2ValueSeriesGenerator.py

@@ -28,7 +28,7 @@ __doc__ = "Value Series generator module: utility module to attach value generat
 
 import math
 import lattice2Executer
-from latticeCommon import ParaConfusion
+from lattice2Common import ParaConfusion
 
 class ValueSeriesGenerator:
     def __init__(self, docObj):