Do not write status file on Disable, Update. Create dummy status files during update if needed.

[vivlingaiah]

• Do not write status file on Disable, Update. These two operations have been overwriting the status of previously executed Run command. So, not writing status files in these two operations will make status related to last execution (last enable ) available even after Update.
• Create dummy status files with status "success" corresponding to those .mrseq files that do not have status files during update. This is to temporarily correct the agent behavior where older agent versions delete the status file on disable during upgrade. After upgrade, there will be poll status timeouts without the status files for previously executed Run Commands. So, these dummy status files help fix that. Latest agent has fixed the issue. However, we need these dummy status files until old agent versions are being used in Production.
• Currently, timeouts are not an issue in production. This is a change in response to changes in agent where agent stopped removing the status files. Dummy status files are needed for older agents that are still in production, because older agents delete the status files in Disable operation that's part of upgrade.