executors performance improvements

[mavlyutov]

На каждый image создается отдельный executor для синхронизации статусов инстансов, хотя эффективней было бы иметь один глобальный job в CloudClient’e.

[axel3rd]

Translation : For each image, a separate executor is created to synchronize the status of the instances, although it would be more efficient to have one global job in CloudClient.

[paksv]

@axel3rd what kind of help do you need on this?

[axel3rd]

@axel3rd what kind of help do you need on this?

@paksv Ideally a Pull-Request 😁. But any tips or guideline from someone which understand the content of this bug would be appreciated (Personally I have never check this problem/bug/feature in details)