Content Pack Validation when Creating a New Version

## Expected Behavior
When creating a new version we must ensure that the selected entities all have there needed
dependencies as part of the content pack.

## Current Behavior
When a user creates a new content pack version, he is able to remove entities which are dependency
to another entity. That way the user creates a content pack which can't be installed or when installed,
the installed entities are not working.

## Possible Solution
Before creating a new version we validate that the content pack has all necessary entities.

## Steps to Reproduce (for bugs)
1. Create a Content Pack with a Lookup Table (the dependency resolution will add adapter and cache).
2. Create a new version of this content pack and remove cache and adapter.
3. Install content pack revision 2