Fixing common security vulnerabilities

Correcting try-except-pass usage, removing assert improper usage.

Change-Id: Ic24c7e8a8f579c6dfd4a9740eff11ab1561af5e1
Signed-off-by: aticig <gulsum.atici@canonical.com>
(cherry picked from commit d3b582a7268d90c072bb7fbe10a25c80851f3c1e)
4 files changed