using local timestamp when inserting state
using ts in update too - incomplete
Bump twisted version
Add service_identity dependency
Bump license year
Add test for service_identity being present
Fix some formatting issues
get_client_ts uses reactor.seconds()
started tests for local ts
code based on get_timestamp returning deferred
Modify verify delete so that it bails if the task_state is 'deleting'
Do not verify if delete does not return 204
Fix docstrings
Merge pull request #627 from rackerlabs/twisted-14.0

AS-213 Bump Twisted to 14.0
working timestamp changes

- get_timestamp() is expected to return value via Deferred to have easy
transition with zk counter
- using :ts in query
- ts is used while creating group and update launch/group config also
- added tests
Docstring cleanups and other review comments from @lvh
Change verified_delete docstring (and some log messages) as per @manishtomar
Use partial, thanks @manishtomar
Use log_with_time and update docstring, thanks @manishtomar
Test what delete_and_verify is called with