Update to clang-format-5 and reformat the codebase 

re #15289

Some tests fail because they use positional arguments in python scripts. Instead of fixing them, I just moved the "LogUnit" to be in the last place

The converted text is stored in separate .rst files in the docs directory.
Refs #9562

If the value passed in can be converted to an integer then create a
PropertyWithValue<int> or TimeSeriesProperty<int> for the 'Number' &
'Number Series' options respectively.

It was just setting the property to the value it already had (since
it's an InOut).