Replace micro module with most recent version

lib/pavilion/micro.py

@@ -79,3 +79,13 @@ def set_default(val: Optional[T], default: T) -> T:
         return default
 
     return val
+
+def iterlen(itr: Iterator[T]) -> Tuple[int, Iterator[T]]:
+    """Get the length of an iterator. Assumes the iterator is
+    finite; i.e. it eventually stops yielding new values.
+    Returns a copy of the iterator with the length. This is
+    necessary because the original iterator is consumed."""
+
+    t1, t2 = tee(itr)
+
+    return len(list(t1)), t2