Return capability execution result

lib/vagrant/host/remote.rb

@@ -32,11 +32,6 @@ module Vagrant
       # @param [Symbol] cap_name Name of the capability
       def capability(cap_name, *args)
         @logger.debug("running remote host capability #{cap_name} with args #{args}")
-        if !client.has_capability?(cap_name)
-          raise Errors::GuestCapabilityNotFound,
-          cap:  cap_name.to_s,
-          guest: name
-        end
         client.capability(cap_name, @env.to_proto, *args)
       end
 

plugins/commands/serve/client/capability_platform.rb

@@ -19,7 +19,8 @@ module VagrantPlugins
                 value: Google::Protobuf::Any.pack(val)
             )]
           )
-          res = client.has_capability(req)
+
+          res = @client.has_capability(req)
           @logger.debug("got result #{res}")
 
           res.has_capability

plugins/commands/serve/service/capability_platform_service.rb

@@ -101,7 +101,13 @@ module VagrantPlugins
             cap_method = target_cap.method(cap_name)
 
             # TODO: pass in other args too
-            cap_method.call(machine)
+            resp =  cap_method.call({})
+            
+            val = Google::Protobuf::Value.new
+            val.from_ruby(resp)
+            SDK::Platform::Capability::Resp.new(
+              result: Google::Protobuf::Any.pack(val)
+            )
           end
         end
       end