Minor fixes in Coordinator related tests
Fix temp directory creation in Coordinator tests
Releasing Voldemort 1.9.2
add log tracing info in failure detector
fix error messages in admin client
add OFFLINE_SERVER state
add admin request handler and admin command for offline state
separate online services from all voldemort services
add streaming switch in metadata store
add ro-fetch switch and unit test
add set-offline admin command in meta set
Correct ancient line & other things in Readme