Unify persistent storage folders

[Woland2k]

Problem:
Currently platform has 2 different folders that need to be persisted between server resets. Folders are:

• "/opt/virtocommerce/platform/wwwroot/cms-content"
• "/opt/virtocommerce/platform/Modules"

It would be more efficient if a single folder can be used.

Solution:
Combine shared folder into a single hierarchy

[lnetrebskii]

Task https://virtocommerce.atlassian.net/browse/VP-3171 has been created

[Woland2k]

One solution for this might be to create images with modules already preinstalled instead of installing it in the environment. That actually follows declarative deployment methodology.