1. The test type "individual" is not very useful.  We should always execute queries in a suite.  Fixed the issue by removing support for different types.  For existing json test definition files, this change won't have any impact, though it would be nice to remove this line from these files:

    "type": "group",

We may extend the framework to allow filtering, but until then, it is recommended that a separate suite be created for the running of a one-off test.

2. Fixed restart drillbit problem.