RemoteModel should define repositoryModel (explicit trait requirement)

[guillep]

Just add a getter

Actually, the issue is that the superclass defines the method.
But the subclass imports the trait and the explicitRequirement redefines the method.

I reposted a fix that only not imports the conflicting explicit requirement method.

Also, add a hash to the class that defines equals.

[guillep]

After some analysis, the issue here is that explicitRequirement has been deprecated!

explicitRequirement
	"If one of the superclasses can perform the selector, we execute the method of that class, otherwise, the explicit requirement error is thrown"

	<debuggerCompleteToSender>
	| sender |
	
	self deprecated: 'This method will be removed in the future version of Pharo. See https://github.com/pharo-project/pharo/issues/15507 for details'.

	sender := thisContext sender.
	[ sender return: (self perform: sender selector withArguments: sender arguments inSuperclass: sender methodClass superclass) ]
		on: MessageNotUnderstood
		do: [ self error: 'Explicitly required method' ]

The thing is, for this kind of scenarios the deprecation gets called first, then the method in the superclass...
Of course, not importing the explicitRequirement method avoids calling the deprecation.