Add SupportStatus class for resources

SupportStatus class has following attributes:
- status (SUPPORTED, DEPRECATED, etc. All allowed support
statuses are defined)
- message (property for providing some information about status)
- version (when resource came into specific support status)

By default support status of each resource is SUPPORTED.

Support status added to Resource class as a static attribute.

Implements bp resource-support-status

Change-Id: Ib3aacdb0f28b09ebeecfc3f13cf22587f8d57f03
Merge "Add SupportStatus class for resources"