ERRORs in ceilometer-acentral log after succesful tempest run

recent merge added duplicate creation of ceilometer user. remove
ceilometer user creation from keystone_data so we can correctly add
ResellerAdmin role to ceilometer user which it needs to interact
with swift

Change-Id: I043c6b9337dfb147c3c8f364b462708a4030b41c
Closes-Bug: #1268730
Merge "ERRORs in ceilometer-acentral log after succesful tempest run"