[jobs] Catch StopIteration for Python 3.7 compatibility

Since Python 3.7 was introduced, StopIteration exceptions are
raised directly when 'next()' doesn't generate a new item. This
patch adds compatibility other Python versions catching this
exception.

Signed-off-by: Santiago Dueñas <sduenas@bitergia.com>

Author: sduenas

sortinghat/core/jobs.py

@@ -468,7 +468,10 @@ def _iter_split(iterator, size=None):
     # This code is based on Ashley Waite's answer to StackOverflow question
     # "split a generator/iterable every n items in python (splitEvery)"
     # (https://stackoverflow.com/a/44320132).
-    while True:
-        slice_iter = itertools.islice(iterator, size)
-        peek = next(slice_iter)
-        yield itertools.chain([peek], slice_iter)
+    try:
+        while True:
+            slice_iter = itertools.islice(iterator, size)
+            peek = next(slice_iter)
+            yield itertools.chain([peek], slice_iter)
+    except StopIteration:
+        return