Update schema

[giorgos-nikolopoulos]

Note that the schema-generate script should be taken from this repository.

Using any other version will probably output different *.go files from the same json schema files.

[giorgos-nikolopoulos]

Updated the schema-generate script to introduce only properties changes.

Some multiline changes happen due to go fmt adding more whitespace.

Another change is that files that contained only the package declaration have been removed. Since no data were declared inside these files they are functionally equivalent.

@chiradeep Let me know if this is ok to merge