At the moment it is not possible to use cloud::database::sql::mysql
on CentOS 7 because of the following error when trying to call the
binary 'test' in 'bootstrap-mysql'.
'test -d /var/lib/mysql/mysql' is not qualified and no path was
specified. Please qualify the command or specify a path.
Change-Id: I937ee32400da3f9c6154bc75ae8897e5c44dfab2