Currently the plugin listing found at the link below [1] is unsorted
by bandit ID number, yet the IDs are listed, making it confusing
to look at.
This patch sorts the plugin list by renaming each plugin filename
so that sphinx sorts accordingly.
[1] https://docs.openstack.org/bandit/latest/plugins/index.html#complete-test-plugin-listing
Change-Id: Ib16b85d1025dd667f711e8571dd58a59deb74d29
6bdc6c0c4e