Unable to push the POT file beginning from the underscore (_) in the filename

Description of problem:
When the POT filename is beginning from the underscore, such as _Exit.2.pot, zanata-cli always fails due to:
[main] ERROR org.zanata.client.commands.push.PushCommand - Operation failed: Error status 404 Not Found returned

Version-Release number of selected component (if applicable):
zanata-client-3.3.2-2.fc21.noarch

How reproducible:
always

Steps to Reproduce:
1.push the pot file to the server
2.
3.

Actual results:
the above error happens.

Expected results:
no error

Additional info: