api-ref: Fix a parameter description in servers.inc
api-ref: Fix a parameter description in servers.inc

Fix the description for the 'flavorRef' parameter
in 'Create Server' API.

Change-Id: I6b0eb733961d0b8d28aea9abf2c21734fd07cb42
Implements: blueprint api-ref-in-rst-pike
Closes-Bug: #1685977

rajalokan/nova,rahulunair/nova,Juniper/nova,gooddata/openstack-nova,jianghuaw/nova,gooddata/openstack-nova,openstack/nova,rajalokan/nova,openstack/nova,jianghuaw/nova,rahulunair/nova,klmitch/nova,openstack/nova,rajalokan/nova,gooddata/openstack-nova,phenoxim/nova,mahak/nova,vmturbo/nova,klmitch/nova,Juniper/nova,mikalstill/nova,vmturbo/nova,vmturbo/nova,klmitch/nova,mahak/nova,rajalokan/nova,vmturbo/nova,mikalstill/nova,phenoxim/nova,mikalstill/nova,jianghuaw/nova,jianghuaw/nova,Juniper/nova,Juniper/nova,klmitch/nova,rahulunair/nova,gooddata/openstack-nova,mahak/nova