Cuckoo: agent.py can be abused for ending analysis through XMLRPC method (Agent.complete())

[remi-armature]

As introduced in #984 a malware sample can proceed to XMLRPC calls for illegitimately call methods.
Calling Agent.complete() leads to ending the analysis and kind of forces the Supervisor into believing the analysis is clean (& complete).

[botherder]

You can also call ExitProcess() and actually make the analysis terminate.