Description of problem:
I am unable to deploy a binary artifact to an app if this artifact is actually hosted in this app

Version-Release number of selected component (if applicable):
devenv_4466 (ami-0b5e5262)

How reproducible:
always

Steps to Reproduce:
1. create a php app
2. make some changes in the app's repo, like echo hello > test.txt
3. git add . ; git commit -am "test" ; git push
4. save a deployment snapshot: 
rhc snapshot-save --deployment -a <%=app_name%>
5. Copy the snapshot file into the app's repo, git commit and push
6. Try to download it and unpack: 
/usr/bin/curl http://<app_name>-<domain_name>.dev.rhcloud.com/<app_name>.tar.gz | /bin/tar -xz (should be downloadable and extractable)
7. Try to deploy it using REST API: 
curl -k -X POST https://ec2-54-211-200-105.compute-1.amazonaws.com/broker/rest/application/531720358351ff670e000069/deployments -d artifact_url=http://app1-lbwjzf.dev.rhcloud.com/app1.tar.gz -u ofayans:redhat

Actual results:

{"api_version":1.6,"data":null,"messages":[{"exit_code":2,"field":null,"index":null,"severity":"debug","text":"Unable to extract deployment archive using command: /usr/bin/curl http://app1-lbwjzf.dev.rhcloud.com/app1.tar.gz | /bin/tar -xz"},{"exit_code":2,"field":null,"index":null,"severity":"error","text":"Unable to complete the requested operation due to: An invalid exit code (2) was returned from the server ip-10-212-107-33.  This indicates an unexpected problem during the execution of your request.\nReference ID: 3db34723125d8c0be54a0a5234610de0"}],"status":"internal_server_error","supported_api_versions":[1.0,1.1,1.2,1.3,1.4,1.5,1.6],"type":null,"version":"1.6"}

Expected results:

Should pass with no problems

Additional info: