test_add_host_to_aggregate is a test method to confirm the behavior of
masakari.compute.nova.API#add_host_to_aggregate method.
In this test method, add_host_to_aggregate method should be called with
'mock_aggregate' object, but as for now, it is called with
'mock_aggregates' object. In addition, add_host method in novaclient is
called with 'mock_aggregates.id'. This is wrong reference.
This patch fix that wrong reference in test_add_host_to_aggregate
method.
TrivialFix
Change-Id: I36b4ddad9286159ae752a2e482a82d4830a33a82