Doc warning for keystone db migration
Doc warning for keystone db migration

The new keystone upgrade features (keystone-manage db_sync --expand)
requires for MySQL deployments that the keystone user is granted SUPER
privilege or that set global log_bin_trust function_creators=1; is run.
Adding a warning message to notify reader.

Change-Id: I78738a335d14c6ad824c348a7385bb1ee8ad75bf
Closes-Bug: 1638368

openstack/keystone,mahak/keystone,ilay09/keystone,mahak/keystone,rajalokan/keystone,ilay09/keystone,openstack/keystone,mahak/keystone,openstack/keystone,rajalokan/keystone,rajalokan/keystone,ilay09/keystone