GraphEngine.DiskImageVerifier: offline data image analysis

[yatli]

It could be useful if we have an offline tool to analyze the disk images. In general it could perform the following tasks:

• Verify the cell entries: Duplication? Invalid addresses? Dead locks? Invalid types?
• Verify low-level cell content: Compare & diff two images.
• Verify high-level cell integrity: extract metadata from a TSL assembly, and check the content of each cell according to the type information.

[TaviTruman]

@yatli this would be a very useful utility indeed! ?I have not run into such difficulties yet but I expect low-level errors might creep in particularly in the case of GE apps running in Service Fabric App model. It would be helpful it an API was available so that the health of the DiskImage could be measured at runtime.