Setting OS_ENDPOINT_TYPE environment option does not work for all cinder client commands

As per the fix for Bug #1453901 in python-cinderclient, support was adding for OS_ENDPOINT_TYPE to bring cinderclient inline with other OS clients. Before that the only environment option available in cinder client, to configure Keystone endpoint type was CINDER_ENDPOINT_TYPE. However despite this fix, CINDER_ENDPOINT_TYPE is still need for some operations such as cinder quota-update

=== By default Cinder client uses "publicURL" as the Keystone endpoint type ===

=== Setting OS_ENDPOINT_TYPE to "internalURL" should expect cinder client to use the internal endpoint returned from Keystone service catalog; this is specially useful if publicURL is over HTTPS ===
$ OS_ENDPOINT_TYPE="internalURL"

$ cinder --debug quota-update 74448d87b1d5472da73dc398ec3e4bf6 --volumes 2 --snapshots 2
DEBUG:keystoneclient.session:REQ: curl -g -i -X GET http://192.168.204.2:5000/v2.0/ -H "Accept: application/json" -H "User-Agent: python-keystonecli ent"
DEBUG:keystoneclient.session:RESP: [200] content-length: 339 vary: X-Auth-Token connection: keep-alive date: Fri, 08 Apr 2016 15:59:17 GMT content-t ype: application/json x-openstack-request-id: req-94a9272d-4aba-4345-a7ef-e877f061b153
RESP BODY: {"version": {"status": "stable", "updated": "2014-04-17T00:00:00Z", "media-types": [{"base": "application/json", "type": "application/vnd .openstack.identity-v2.0+json"}], "id": "v2.0", "links": [{"href": "http://192.168.204.2:5000/v2.0/", "rel": "self"}, {"href": "http://docs.openstac k.org/", "type": "text/html", "rel": "describedby"}]}}

DEBUG:keystoneclient.auth.identity.v2:Making authentication request to http://192.168.204.2:5000/v2.0/tokens
DEBUG:keystoneclient.session:REQ: curl -g -i -X PUT https://10.10.10.2:8776/v1/0713dca80afe4e018ebebb1196178de6/os-quota-sets/74448d87b1d5472da73dc3 98ec3e4bf6 -H "User-Agent: python-cinderclient" -H "Content-Type: application/json" -H "Accept: application/json" -H "X-Auth-Token: {SHA1}e45828e0b3 a20bb258d867f62938044e957abfc3" -d '{"quota_set": {"tenant_id": "74448d87b1d5472da73dc398ec3e4bf6", "snapshots": 2, "volumes": 2}}'
ERROR: SSL exception connecting to https://10.10.10.2:8776/v1/0713dca80afe4e018ebebb1196178de6/os-quota-sets/74448d87b1d5472da73dc398ec3e4bf6: [Errn o bad handshake] [('SSL routines', 'SSL3_GET_SERVER_CERTIFICATE', 'certificate verify failed')]

==== cinder client got the publicURL despite setting OS_ENDPOINT_TYPE to "internalURL" ====

=== setting CINDER_ENDPOINT_TYPE to internalURL gives the proper endpoint and command goes through ===

$ export CINDER_ENDPOINT_TYPE=internalURL
$ cinder quota-update 74448d87b1d5472da73dc398ec3e4bf6 --volumes 2 --snapshots 2
+-----------------+-------+
| Property | Value |
+-----------------+-------+
| gigabytes | 1000 |
| gigabytes_iscsi | -1 |
| snapshots | 2 |
| snapshots_iscsi | -1 |
| volumes | 2 |
| volumes_iscsi | -1 |
+-----------------+-------+