I made all the constructors of ResteasyClient class package protected.
You must now use the ResteasyClientBuilder class to build instances of
ResteasyClient if you don't use the standard ClientFactory class.
Also, the ResteasyProviderFactory that each ResteasyCLient uses no
longer comes from ResteasyProviderFactory.getInstance() by default.
Instead, it instantiates a factory or client instance.
I had to change a LOT of unit tests, so you may want to do a merge if
you are working from master.
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