Services filter fixed. And service operations now throws dockerapiexc…#358

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n7on wants to merge 4 commits intodotnet:masterfrom

Commits on Nov 18, 2018

Services filter fixed. And service operations now throws dockerapiexception on error
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Commits on Nov 19, 2018

Null servicecreateparameters test. Newlines removed. Servicefilter mode null as default. New dockerswarmexception added
n7on
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Commits on Nov 22, 2018

null check, and simplifications
n7on
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Commits on Nov 24, 2018

Now using jsonserializer of instance for custom error handler in SwarmOperations.
n7on
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