BUG/MINOR: lua: Abort when txn:done() is called from a Lua action

BUG/MINOR: lua: Abort when txn:done() is called from a Lua action

When a lua action aborts a transaction calling txn:done() function, the action
must return ACT_RET_ABRT instead of ACT_RET_DONE. It is mandatory to
abort the message analysis.

This patch must be backported everywhere the commit 7716cdf45 ("MINOR: lua: Get
the action return code on the stack when an action finishes") was
backported. For now, no backport needed.