refactoring of exceptions classes

[ethaaalpha]

This pull request depends on /internal/application pull request.

What's new!?

Exception refactoring

For simplifying the use of exceptions and avoid some useless try/catch/rethrow patterns, we have decided to simplify them.

First of all, we have deleted BusinessException and replaced by VipException it-self. Others child implementation like DAOException, CoreException might be deleted in the future and can be replaced by something new!

Instead of creating child-classes for specific cases with specifics errors codes you can implement your own VipError enum!
Indeed VipException can take an object that implement VipError.

VipError is a new interface that mix up the old VipError and VipErrorMessage classes!
You can now easily implement your own specific errors with an error code associated (see ApiError) in the concerned module.

Since a lot of errors are common, the DefaultError enum provided some of them.

Scheme

A scheme might be the easiest way to understand the new structure!

classDiagram
direction LR
  class VipException {
    + VipError error
  }
  class VipError {
	  + getCode()
	  + getMessage()
  }
  class DefaultError {
	  NOT_FOUND(1000, "item not found")
  }
  class ApiError {
	  APP_NOT_FOUND(8006, "app not found")
  }
	<<Interface>> VipError
	<<Enumeration>> DefaultError
	<<Enumeration>> ApiError
  VipException --* VipError
  VipError --|> DefaultError
  VipError --|> ApiError
	class VipException:::Aqua
	class VipException:::Sky
	class VipError:::Peach
	class DefaultError:::Ash
	class ApiError:::Ash
	classDef Peach :,stroke-width:1px, stroke-dasharray:none, stroke:#FBB35A, fill:#FFEFDB, color:#8F632D
	classDef Aqua :,stroke-width:1px, stroke-dasharray:none, stroke:#46EDC8, fill:#DEFFF8, color:#378E7A
	classDef Sky :,stroke-width:1px, stroke-dasharray:none, stroke:#374D7C, fill:#E2EBFF, color:#374D7C
	classDef Ash :,stroke-width:1px, stroke-dasharray:none, stroke:#999999, fill:#EEEEEE, color:#000000

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Note

You can still use VipException without VipError by using others classical contructors

Others changes

• ApiException (which became ApiError) is moved back into vip-api module.
• all /internal/** endpoints use the adapted errors codes