Implements a lua table slicing facility

scripts/lua/modules/lua_utils.lua

@@ -1577,6 +1577,16 @@ function table.len(table)
   return count
 end
 
+function table.slice(tbl, first, last, step)
+   local sliced = {}
+
+   for i = first or 1, last or #tbl, step or 1 do
+      sliced[#sliced+1] = tbl[i]
+   end
+
+   return sliced
+end
+
 -- ############################################
 -- Redis Utils
 -- ############################################