Merge pull request #157 from yeukhon/master

Fixed invite test failure and added a test for #155.
Merge pull request #159 from yeukhon/master

Fixed 158. Update minion-create-plan and remove minion-start-scan.
Fixes #162 Do not setup mongodb is it is not specified in the config file
Fixes #162 Do not setup mongodb is it is not specified in the config file