Description of problem:
After upgrading from cns 3.5 to 3.6 following the steps outlined in [1], new volume creation fails.

heketi-cli volume create --size=1
Error: No space

[heketi] INFO 2017/10/03 08:01:14 Creating volume 3c70fa03cac988ec7c55bd8cf632679a
[heketi] ERROR 2017/10/03 08:01:14 /src/github.com/heketi/heketi/apps/glusterfs/volume_entry.go:290: Volume being ask to be created, but there are no clusters configured
[negroni] Started GET /queue/2cc3e5a3f570f92bf1e9aed73f531ccd
[negroni] Completed 200 OK in 47.91µs
[asynchttp] INFO 2017/10/03 08:01:14 asynchttp.go:129: Completed job 2cc3e5a3f570f92bf1e9aed73f531ccd in 115.386862ms
[heketi] ERROR 2017/10/03 08:01:14 /src/github.com/heketi/heketi/apps/glusterfs/app_volume.go:149: Failed to create volume: No space
[negroni] Started GET /queue/2cc3e5a3f570f92bf1e9aed73f531ccd
[negroni] Completed 500 Internal Server Error in 89.654µs

heketi-cli cluster list
Clusters:
Id:83767272f27df11472bb41f0318ba7a5 []

file and block access for the cluster seems to be missing from the above output. 

[1] - https://access.qa.redhat.com/documentation/en-us/red_hat_gluster_storage/3.3/html-single/container-native_storage_for_openshift_container_platform/#idm140661927080880

Version-Release number of selected component (if applicable):
cns-deploy-5.0.0-52.el7rhgs.x86_64

How reproducible:
1/1

Steps to Reproduce:
1. upgrade cns 3.5 to 3.6
2. provision volumes after the upgrade