'build' task doesn't work without specifying additional options

[yanex]

The :examples:group-oauth:processResources task fails to process resources because of the unknown serverHost parameter:

> Could not get unknown property 'serverHost' for file '/Users/yan/projects/vk-java-sdk/examples/group-oauth/src/main/resources/config.properties' of type org.gradle.api.internal.file.copy.DefaultFileCopyDetails_Decorated.

I suppose I need to set it somehow, though I doubt it should be required just to build the SDK and examples against it (especially considering the fact there's no single test for the VK SDK itself). Consider setting the default parameter values so clean build will work properly.