Create a tool for updating/checking version service files

We need a tool which will be able to:

1. automatically generate/update json files for new release (eg. you specify software versions and it generates json file from previous one)

2. update image hashes in existing json file

3. check json

   1. for each image in the json file connect to dockerhub and check if the hash is the same

   2. check that the versions are correct (where possible, at least for operator release etc.)

4. check if the specified endpoint is returning the same data as in jsonfile (command "check-endpoint")