Remove anonymous mysql users
Remove anonymous mysql users

Since we're closer to packaged upstream, which may have default
anonymous users, remove them before creating our user to avoid issues
with default matching of 'localhost' [1]

[1] http://dev.mysql.com/doc/refman/5.7/en/adding-users.html

Change-Id: I5564ae9b54aa29ff60d7eb384cb1b64a70586815

Tesora/tesora-project-config,noorul/os-project-config,openstack-infra/project-config,dongwenjuan/project-config,noorul/os-project-config,openstack-infra/project-config,dongwenjuan/project-config,Tesora/tesora-project-config