Simplify the state transition on stream

Simplify the state transition on stream

• the stream is created on INITIALIZING
• when the stream is started, it would start transition from INITIALIZING to INITIALIZED
• it would serve stream operations when the stream is INITIALIZED
• it would be turned to ERROR when encountered exceptions.
• the stream would be closed when service operation timeout or encountered any exceptions. it would first be removed from acquired mapping
• the stream would be removed from cached mapping depends on probation time.