gst/gstelementfactory.c: Remove unnecessary ref/unref pair

gst/gstelementfactory.c: Remove unnecessary ref/unref pair

Original commit message from CVS:
* gst/gstelementfactory.c: (gst_element_factory_create):
Remove unnecessary ref/unref pair
* gst/parse/grammar.y:
Make sure to free the parse buffer on all code paths.
Move a g_free up to the error handler where it's easier to see.
* tests/check/gst/gstevent.c: (test_event):
Extending timeout for downstream travelling events to 10 seconds to
hopefully avoid intermittent failure on the buildbots.
* tests/check/pipelines/parse-launch.c: (run_delayed_test):
Don't manually set the state of the src element - it will happen as a
natural consequence of the pipeline changing state, and that way it
will do it in the right order too.