pwcli: fix few pep8 warnings
pwcli: fix few pep8 warnings

From Johannes' changes:

pwcli:2243: local variable 'e' is assigned to but never used
pwcli:2244:16: E713 test for membership should be 'not in'

Signed-off-by: Kalle Valo <7081a7d99b8c74c0698a728df19e3915a995d7e1@codeaurora.org>

kvalo/pwcli,kvalo/pwcli