Make graphqlValidateQueries setting more configurable

[muuki88]

The graphqlValidateQueries should work like the graphqlCodegenQueries in the CodegenPlugin and use the include and exclude filter settings.

    resourceDirectories in graphqlValidateQueries := (resourceDirectories in Compile).value,
    includeFilter in graphqlCodegen := "*.graphql",
    excludeFilter in graphqlCodegen := HiddenFileFilter,
    graphqlCodegenQueries := Defaults
      .collectFiles(resourceDirectories in graphqlValidateQueries,
                    includeFilter in graphqlValidateQueries,
                    excludeFilter in graphqlValidateQueries)
      .value