Enables H306 pep8 rules

Updates tox.ini to reduce ignored rules.

Updates code for H306 violation.

Change-Id: I9beea02510a1122afb55ad3df3b37f770fe05134
Enables H403 pep8 rules

Updates tox.ini to reduce ignored rules.

Updates code for H403 violation.

Change-Id: Iee7b34a27c62ce8cb0f26166b3c16e3386e2fecd
Merge "Enables H306 pep8 rules"
Merge "Enables H403 pep8 rules"