Printing of unbalanced arrays can result in an error

[coquelin77]

Description
see title

To Reproduce

a = ht.arange(3 * 4, split=0).reshape((3, 2, 2))
print(a[0])

[1,0]<stderr>:Traceback (most recent call last):
[1,0]<stderr>:  File "local_test.py", line 327, in <module>
[1,0]<stderr>:    print(a[0])
[1,0]<stderr>:  File "/Users/c.comito/HAF/heat/heat/core/dndarray.py", line 3357, in __str__
[1,0]<stderr>:    return printing.__str__(self)
[1,0]<stderr>:  File "/Users/c.comito/HAF/heat/heat/core/printing.py", line 74, in __str__
[1,0]<stderr>:    tensor_string = _tensor_str(dndarray, __INDENT + 1)
[1,0]<stderr>:  File "/Users/c.comito/HAF/heat/heat/core/printing.py", line 172, in _tensor_str
[1,0]<stderr>:    torch_data = _torch_data(dndarray, summarize)
[1,0]<stderr>:  File "/Users/c.comito/HAF/heat/heat/core/printing.py", line 99, in _torch_data
[1,0]<stderr>:    data = dndarray.copy().resplit_(None)._DNDarray__array
[1,0]<stderr>:  File "/Users/c.comito/HAF/heat/heat/core/dndarray.py", line 2692, in resplit_
[1,0]<stderr>:    self.comm.Allgatherv(self.__array, (gathered, counts, displs), recv_axis=self.split)
[1,0]<stderr>:  File "/Users/c.comito/HAF/heat/heat/core/communication.py", line 674, in Allgatherv
[1,0]<stderr>:    self.handle.Allgatherv, sendbuf, recvbuf, recv_axis
[1,0]<stderr>:  File "/Users/c.comito/HAF/heat/heat/core/communication.py", line 642, in __allgather_like
[1,0]<stderr>:    exit_code = func(mpi_sendbuf, mpi_recvbuf, **kwargs)
[1,0]<stderr>:  File "mpi4py/MPI/Comm.pyx", line 652, in mpi4py.MPI.Comm.Allgatherv
[1,0]<stderr>:mpi4py.MPI.Exception: MPI_ERR_TRUNCATE: message truncated

Expected behavior
Print should happen without an error

Version Info
current master (as of 2.7.20)