As openstack installation guides suggest to run mysql with root shell
user, mysql will not ask for password, so the "-u root -p" is useless.
Change-Id: I5ffa77971ecbcc9210b185a39842140b3acd8147
Related-Bug: #1785025
The legacy install-guide directory is removed, projects
host thei install-guide under /doc/source/install/.
It should have been done in:
Ifdeb7c669e7f2351aff837f43f2fa3515a89e086
Change-Id: Ia65804cd01ada25f6b61c1c4bcb246d5a4c9c570