update to version 1.5.0
* Replace functions 'Dict.get' and 'del' with 'Dict.pop'
* Trivial:Standardize the output format of 'help' in shell.py
* Show resource name path in event log formatter
* Clean imports in code
* Add parameter_merge_startegies section
* Modify use of assertTrue(A in B)
* Update .gitreview for stable/newton
* Import mox in __init__.py

- update to 1.4.0:
* Updated from global requirements
* Add a nested_depth argument to poll_for_events
* Update the home-page in setup.cfg
* Standardize import format
* Remove unused function
* Change usage of _auth_url private attribute
* Remove discover from test-requirements
* Add support for stack file list
* Trivial: Remove out-of-date and useless example
* Add Python 3.5 classifier and venv
* Fix doc build if git is absent
* Fix deprecation message for stack-preview
* Remove unused LOG
* Remove white space between print and ()
* base.Resource not define __ne__() built-in function
* Fix typo
* Pass correct arguments in osc plugin
* Use osc_lib instead of cliff
* Use osc-lib instead of openstackclient