**What**
update module definitions in `ConfigModule` to support the following module configuration methods:
- none: defaults are loaded
- boolean `inventoryService: true|false`, if true the defaults are loaded, false throws if it's a required module, if the module is not required it's not loaded
- string: `inventoryService: "..."`, treats the string as a path to the overriding module, (we dont handle the case where a string is given but the module is not overridable, we just load the default in that case)
- `ConfigurableModuleDeclaration = { resolve?: string, options?: Record } `, like plugins, options can be used to pass configs to the main service of the module, if not defined no options are passed. Resolve is like string, if defined it's used to look for a custom module, otherwise the default is loaded.
Testing:
- Added unit tests for:
- `loaders/modules.ts`
- `loaders/module-definitions/index.ts`
Fixes CORE-932
37aaca0da4