https://pagure.io/python-pytest-multihost/issue/12

• Modified run_command to add -n to echo
• added test_piping_input
• dropped newline from assert for:
• test_escaping
• test_escaping_binary
• test_background_explicit_wait
• test_background_context

echo -e used by stdin_text processing is appending an extra
newline character to stdin. For some commands this causes
problems.

$ echo -e test|base64
dGVzdAo=

vs:

$ echo -en test|base64
dGVzdA==

and:

$ echo -en test> test_file
$ cat test_file|base64
dGVzdA==

So if stdin is a string that doesn't already contain a newline,
we shouldn't append it as extra to the end of what we pass to
the command.

Signed-off-by: Scott Poore spoore@redhat.com