Small updates and fixes

Updated polarizer.py in USER-DRUDE to use coul/long/cs

(cherry picked from commit 6410797697ddffbd5b47f526dcabd74f67ff6108)

Fixing Kokkos per-atom energy/virial issues

Kokkos morse

Fix data type of molecule array in npair_kokkos.h

fix Kokkos+kspace warnings

Fixing tagint and imageint issues in Kokkos package

Fix additional tagint issue in fix qeq/reax/kk

Add triclinic neighbor list support to Kokkos

Fix GPU sync bugs

This showed up when trying to compile with -DLAMMPS_BIGBIG.
Fixes issue #365

see commit 09fc8b0b for details on why

because the verlet_kokkos system has
a "clever" optimization which will
alter the datamasks before calling sync/modify,
so the datamask framework must be
strictly obeyed for GPU correctness.
(the optimization is to concurrently
compute forces on the host and GPU,
and add them up at the end of an iteration.
calling your own sync will overwrite
the partial GPU forces with the
partial host forces).

this variable is only used when FFTW3
is enabled, so its declaration and
initialization should be protected
under the same conditions to avoid
compiler warnings

the variable (offset) is only
used in a subset of numerous
scenarios with #ifdef, it seems
better just to have each loop
declare it as needed.
(avoids compiler warnings)