Ignore false positive Bandit test
Ignore false positive Bandit test

Improvements[1] to the B105 hardcoded_password_string[2] test in Bandit
result in it now catching a false positive. Add a # nosec comment to
skip Bandit testing of that line.

[1] https://github.com/PyCQA/bandit/issues/386
[2] https://bandit.readthedocs.io/en/latest/plugins/b105_hardcoded_password_string.html

Change-Id: I822526a7dbdd9be51edefaf6b24011fcce6e4121

openstack/heat,openstack/heat