Add PyInstaller spec file
Add PyInstaller spec file

This facilitates a 'onedir' portable format for confluent server.
The 'onefile' mode couldn't be made to work, but this should suffice.

xcat2/confluent,chenglch/confluent,jufm/confluent,whowutwut/confluent,chenglch/confluent,jjohnson42/confluent,jufm/confluent,jjohnson42/confluent,whowutwut/confluent,xcat2/confluent,chenglch/confluent,jufm/confluent,jjohnson42/confluent,jufm/confluent,jjohnson42/confluent,xcat2/confluent,whowutwut/confluent,whowutwut/confluent,xcat2/confluent,jufm/confluent,xcat2/confluent,chenglch/confluent,jjohnson42/confluent,chenglch/confluent