Add continuation token to list status api

[akharit]

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This checklist is used to make sure that common guidelines for a pull request are followed.

Description of the change

Add continuation token to LISTSTATUS api call
Update api-version to 2018-09-01

General Guidelines

• The PR has modified HISTORY.rst with an appropriate description of the change and a version increment.
• The PR has supporting test coverage that confirm the expected behavior and protects against regressions, including necessary recordings.
• Links to associated bugs, if any, are in the description.

[coveralls]

Coverage increased (+1.3%) to 86.564% when pulling 0bde554 on add-ContinuationToken into 1a73c66 on dev.