* #568 Ocelot wont start if QoSOptions specified and no QoS DelegatingHandler registered e.g. no use of Ocelot.Provider.Polly. Also adds a NoQosDelegatingHandler and logs an error if ive missed something and the user can get to making the request
* #568 sadly something wierd with IServiceProvider and FluentValidation so I'm just defaulting to warning and noqosdelegatinghandler if someone doesnt register but provides options, also added basic in memory cache in case people dont use a specific package
* #555 added some tests for this issue but struggling to replicate
* #555 removed cmd=instance from service fabric code as someone who knows service fabric says its not needed
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* #555 renamed test
* added delegate to select last handler
* #529 implemented a way we can inject the last delegating handler
* wip - moving code
* #529 removed loads of qos code and moved it into Ocelot.Provider.Polly
* #529 can now inject http client expcetions to ocelot errors mappers and updated docs
* added delegate to select last handler
* #529 implemented a way we can inject the last delegating handler
* wip - moving code
* #529 removed loads of qos code and moved it into Ocelot.Provider.Polly
* #529 removed consul deps and introduced delegate to find service discovery provider
* +semver: breaking moved consul configuration to package..introduced mechanism for packages to configure Ocelot pipeline
* Made the file config poller use IHostedService, bit more generic, not just need to provide the correct implementations of the repo services and it will poll anything..this means we can open up redis for #458
* removed comments
* #458 allow users to set rate limits per service for dynamic re routes
* #458 added docs for rate limting on dynamic reroutes
* Made the file config poller use IHostedService, bit more generic, not just need to provide the correct implementations of the repo services and it will poll anything..this means we can open up redis for #458
* removed comments
