Hammer CLI

Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1315255
Description of problem:

Using hammer to dump templates out, it will not prompt
for the password when redirecting the output to a file,
resulting in an error.

Passing the --password option to hammer does work but
is not acceptable as this leaves the password in clear
text in the users history.

Version-Release number of selected component (if applicable):

6.1.7

How reproducible:

100%

Steps to Reproduce:
1. # hammer --username admin template dump --name epel > snippet-epel.erb
2.
3.

Actual results:

1. hammer --username admin template dump --name epel > snippet-epel.erb
   Invalid username or password

Expected results:

As per when hammer is run without redirecting to a file

1. hammer --username admin template dump --name epel
   [Foreman] Password for admin:

Additional info:

Customer has suggested that dump should have a switch to send
the output to a file, in the same way as the create has a switch
to import from a file.