bitbake: cooker: Improve parsing failure from handled exception usability

When a recipe raises a BBHandledException, it means the error was already
shown to the user. Adding an additional one here isn't helpful. What is
helpful is to mention that parsing was halted.

Tweak the code to do this with improves the messages the user sees
and helps understand what happened.

(Bitbake rev: fdf6ebc8b603fcfd3ed7c64baf486a4adabd25be)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/cooker.py

@@ -2167,6 +2167,8 @@ class CookerParser(object):
                                             self.total)
 
             bb.event.fire(event, self.cfgdata)
+        else:
+            bb.error("Parsing halted due to errors")
 
         for process in self.processes:
             self.parser_quit.put(None)
@@ -2257,7 +2259,7 @@ class CookerParser(object):
             return False
         except bb.BBHandledException as exc:
             self.error += 1
-            logger.error('Failed to parse recipe: %s' % exc.recipe)
+            logger.debug('Failed to parse recipe: %s' % exc.recipe)
             self.shutdown(clean=False, force=True)
             return False
         except ParsingFailure as exc: