Prepare for enabling H302 rule(services/telemetry, object_storage, etc)

Currently H302 rule is ignored by tox. However, this rule should
be enabled. This patch partially fixes this problem to prepare for
H302 rule.

Change-Id: I5b2d2f872de7a1cb846d3002022ff7ffa613813a
Merge "Prepare for enabling H302 rule(services/telemetry, object_storage, etc)"