[placement] api-ref GET /traits name:startswith
[placement] api-ref GET /traits name:startswith

In the Placement API reference, the GET /traits [1] query parameter
'name' says it accepts a key called 'starts_with'. The actual API
accepts 'startswith' (no underscore).

[1] https://developer.openstack.org/api-ref/placement/#list-traits

Change-Id: I5a1fa51fc751f2492ae6aa2b38893a9e06a26ed1
Closes-Bug: #1714283

mikalstill/nova,phenoxim/nova,rahulunair/nova,gooddata/openstack-nova,mahak/nova,openstack/nova,rahulunair/nova,rahulunair/nova,openstack/nova,gooddata/openstack-nova,mahak/nova,gooddata/openstack-nova,phenoxim/nova,gooddata/openstack-nova,openstack/nova,mikalstill/nova,klmitch/nova,mahak/nova,klmitch/nova,klmitch/nova,mikalstill/nova,klmitch/nova