[VXQUERY-180] REST Server implementation

- Implemented REST API
- Altered CLI to use REST API
- Migrated XTests to use REST API

details:
- Implemented the REST Server to start through the cluster controller
  application.
- CLI now calls the REST API (remote if given, local one else) to
  execute queries.
- Migrated XTests to use the REST API to run queries related to tests
73 files changed