Feature/add ha sync batch size

[ArgTang]

#125

• Adding property to PolicyDefinition to support setting sync batch size
• VS changed indenting based on .editorconfig
• Fix Docker connection, for running tests https://github.com/microsoft/Docker.DotNet/issues/397#issuecomment-500186485

[ArgTang]

@zidad I am not too familiar with travis, do you have an idea for what could be wrong?

[zidad]

I'm not sure if we should keep the travis build in there. Seems a bit overkill now with .NET core. @luigiberrettini knows about this? Can we just get rid of the travis build or did the changes in the PR break the build?

[zidad]

@ArgTang what was the need for the changes in the docker configuration, before it seemed to run fine on travis, can you undo that and see if it works?

[ArgTang]

@zidad i can try when i get home. The reason for the change was that i was not able to run any of the tests on my local machine.

[luigiberrettini]

Having AppVeyor and Travis CI allows to build code and run tests against Docker containers on both Windows and Linux. It would be nice to also do so on OS X but Docker support for Travis CI matrix builds was missing at the moment I created the scripts (I didn't check if this is still the case).

[ArgTang]

@zidad reverted test running changes.

[Pliner]

Fixed in #172