Disambiguate DynamicTableWriter constructors taking an array from the point of view of jpy.

[jcferretti]

With two public constructors looking like:

DynamicTableWriter(final String[] columnNames, final Class<?>[] columnTypes)
DynamicTableWriter(final String[] columnNames, final Type<?>[] columnTypes)

jpy can't tell which to call with a list for the second argument:

r-Scheduler-Serial-1 | i.d.g.s.SessionState      | Internal Error '17a7b995-3319-470d-9452-7e0fadac8722' java.lang.RuntimeException: Error in Python interpreter:
Type: <class 'RuntimeError'>
Value: ambiguous Java method call, too many matching method overloads found

Creating an intermediate jpy.array on the python side works, but is a clunky API to be forced on users (see image attached).
Since we want to move to qst and away from Class anyway, I am making the constructors package-private, and replacing their use with the TableHeader based one.