[make:entity] helper message with two classes having the same name under different namespaces

[jeromegxj]

As discussed in #1292 this is how I see the feature, let me know what you think about it.

New output when using classes with same name:

$ bin/console m:entity Order
 Your entity already exists! So let's add some new fields!

 New property name (press <return> to stop adding fields):
 > orderLogistic

 Field type (enter ? to see all types) [string]:
 > relation

 What class should this entity be related to?:
 > Logistic\Order

What type of relationship is this?
 ------------ ----------------------------------------------------------------------------
  Type         Description
 ------------ ----------------------------------------------------------------------------
  ManyToOne    Each Order relates to (has) one Logistic\Order.
               Each Logistic\Order can relate to (can have) many Order objects.

  OneToMany    Each Order can relate to (can have) many Logistic\Order objects.
               Each Logistic\Order relates to (has) one Order.

  ManyToMany   Each Order can relate to (can have) many Logistic\Order objects.
               Each Logistic\Order can also relate to (can also have) many Order objects.

  OneToOne     Each Order relates to (has) exactly one Logistic\Order.
               Each Logistic\Order also relates to (has) exactly one Order.
 ------------ ----------------------------------------------------------------------------

 Relation type? [ManyToOne, OneToMany, ManyToMany, OneToOne]:
 >

fixes #1292

[javiereguiluz]

A nice improvement! Thanks Jérôme

[jrushlow]

Thank you @jeromegxj!