PR for Ruby SDK - release-0.5.1

batch_response.rb was ignoring the body if it’s on a single line at the boundary end
Rubocop’d virtual_network_managements/serialization.rb
Fixed the XML Schema error. Current code was serializing duplicate dns server nodes if multiple VNets used the same DNS servers
Added BusyRole to accepted virtual_machine.status values for the test case
Minor modifications to test data