change jax-rs endpoind from complete to confirm
change jax-rs endpoind from complete to confirm

when reading the spec I was misguided by the jax-rs endpoint naming.
The word 'complete' is used as compensator handler naming and
this example shows on starting and ending LRA by end.
I think it should not use the same naming.

Signed-off-by: Ondra Chaloupka <78855cebaa86efb6d9c49c39f7233b3f5182c420@redhat.com>

ochaloup/microprofile-sandbox