I know this is an old post, but I have a partial solution for everyone who came across this question.
From the path: "domain / servers / myadminservername / upload / mywarfilename / app" you can change the first part of this (you can edit "server / myadminservername / upload") to go to any directory with respect to the WLS domain.
Go to the administrator console (using: serverIP: serverPort / console), and in the left part follow the tree: environment → servers → (AdminServerName) → Configuration → Deployment → Download directory name
The "name of the download directory" may contain the path to the directory related to the domain.
So at least "domain / servers / myadminservername / upload / mywarfilename / app" can become "domain / path_of_your_choice / mywarfilename / app"
Hope this helps someone
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