Make clients final

[sagikazarmark]

Q	A
Bug?	no
New Feature?	yes
Version	2.0.0

Make the rest of clients final. See #18 and #19

• BatchClient
• BatchResult
• Deferred
• LeastUsedClientPool
• RoundRobinClientPool
• HttpMethodsClient
• PluginClient
• PluginClientFactory
• All Plugins

[dbu]

updated description, i think we should also make all other classes that are not meant to be extended final.

[Jean85]

I was trying to address this issue, but making the last non-final plugin final (RedirectPlugin) is pretty hard, since the class is extended in the specs to create stubs. This is obviously wrong because it tries to test internal behavior, but I'm not be able to solve that easily. Anyone else up for this?

[dbu]

i guess thats why its not yet final :-/
can you do a pull request with all that works, and a note that the RedirectPlugin is missing? maybe mark can see if he finds a better way for the testing of that plugin?

[sagikazarmark]

Yup, will take a look at it: #21

[dbu]

i think we now made final everything that can be final