No error message is logged to y2log when there is a syntax error in a python
yast module. The module fails to load, but the log appears to show everything
succeeded.

2019-05-21 08:08:38 <1> linux-0bgx(13335) [ui]
YCP_UI.cc(SetApplicationTitle):1722 Setting application title to '"YaST2 -
samba-internal-dns-manager @ linux-0bgx"'
2019-05-21 08:08:38 <1> linux-0bgx(13335) [ncurses] NCurses.cc(SetTitle):476
Draw title called
2019-05-21 08:08:38 <1> linux-0bgx(13335) [Interpreter] bin/y2start:58 Calling
YaST client samba-internal-dns-manager
2019-05-21 08:08:38 <1> linux-0bgx(13335) [Interpreter] bin/y2start:58 Called
YaST client returned.