Merge request status model

Status	Description	Method to turn the status	Logged in the event manager

Status	Description	Method to turn the status	Logged in the event manager
NEW	Initial status for the new preperson merge request.	Create merge request.	Yes
APPROVED	Status for preperson merge request approved by person	Approve merge request	Yes
EXPIRED	Final status for preperson merge request rejected by scheduller	Auto expiration of merge request	Yes
REJECTED	Final status for preperson merge request rejected manually	Create merge request. (for old requests) Reject merge request	Yes
SIGNED	Final status for preperson merge request signed by employee	Sign merge request	Yes