When getting floatingips with Nova API, the results will be filtered
with the 'tenant_id'.
So, we can only get the floatingips belonging to the tenant of the current
context.
When ceilometer invokes novaclient to list floatingips, it will get an
empty list because the tenant is 'service'.
we should allow an admin user to index all tenants's floatingip by adding a
parameter 'all_tenants'.
This patch provides CLI support
Change-Id: I35a2155401247d49017bf3c03341b082cb87750d
Closes-bug: #1262124
Some methods which should have returned objects dit not return and some
methods which don't return anything used return ... Fixed all that and
added tests to detect two returns which were missing.
Fixes bug 892058
Change-Id: If59468cfe1c7b1ab74ed0bfc6f81590dfd5dd668
