OTC provider doesn't support to set schedule hint yet

[freesky-edward]

This is a feature request instead of bug report.

Use Case

The OpenStack cinder supports to add schedule parameters when creating
volume, the name of the parameters in API doc is "OS-SCH-HNT:scheduler_hints"
that can be found in Cinder API document[1]
In some cases, the user wish to set the parameters to fix the volume location.
Now, the otc provider does not support this parameter

References

[1] https://developer.openstack.org/api-ref/block-storage/v3/index.html#volumes-volumes

[gator1]

rootpath needs to be gator1. You need to use govendor and copy the directory from gator1/gophercloud to gophercloud/ggphercloud to remain consistent.

The current PR is rejected.