tempest_plugin: drop telemetry decorator

Since [1], 'telemetry' service does not exist and Tempest plugin is now
broken:

InvalidServiceTag: Invalid service tag
Details: telemetry is not a valid service

This patch update the test_object_storage_telemetry_middleware test to
match with the Tempest cleanup.

[1] https://github.com/openstack/tempest/commit/e4796f8de446aaaafa83902d1fb2d613331436cf

Change-Id: I2ae71b722826a4e377a4926c943d1dbce3b1ed9f
1 file changed
tree: f5c25f7317c970af5f73e6d0d547f4b3e2e552ad
  1. ceilometer/