Repeat batch-objects with weaviate errors

[dirkkul]

When Weavaite is not able to add objects because of various reasons it returns an error for this object. For some errors (for example a transformer timeout) it makes sense to try the object again while for others it doesn't (disk full).

The java client should be able to repeat these failed objects. However the users should specify which errors are repeated or ignored.

Note: The python client supports something similar, have a look here and here