Fix flake8 error caused by using type instead of isinstance

Change-Id: Iccbf5a3a61e7b1c76c8e4e062fd8c24a09a39314
Signed-off-by: gatici <gulsum.atici@canonical.com>
(cherry picked from commit d7debb9afcbfe0fb1c112ea0834458753ffe34b1)
1 file changed