v0.9.3: Merge pull request #5 from JJ11teen/dev

• fix wrapper parameters, add test for them in future
• move test config for providers to purely env vars (remove provider setup cli args)
• update azure-data-tables optional dependency
• reorder parameters to be more consistent
• default to using connection_string if available for azure providers
• no longer raise error if multiple forms of auth are passed in for azure providers
• improve test cleanup script