Fix the Greeting message - package is an attribute of version, not QMP.

At this stage, we can connect to a QEMU server and issue commands and queries.

test/unit/qmp_client/test_messages.rb

@@ -12,16 +12,16 @@ module TestQMPClient
       COMMAND_TXT = COMMAND_HSH.to_json
 
       GREETING_MSG = Messages::Greeting.new(
-        {'qemu' => {'micro' => 50, 'minor' => 13, 'major' => 0}},
+        {'qemu' => {'micro' => 50, 'minor' => 13, 'major' => 0}, 'package' => ''},
         "", []
       )
-      GREETING_HSH = {
-        'QMP' => {
-          'version' => {'qemu' => {'micro' => 50, 'minor' => 13, 'major' => 0}},
-          'package' => "",
+      GREETING_HSH = { 'QMP' => {
+        'version' => {
+          'qemu' => {'micro' => 50, 'minor' => 13, 'major' => 0},
+          'package' => ''
         },
         'capabilities' => []
-      }
+      }}
       GREETING_TXT = GREETING_HSH.to_json
 
       ETIME = Time.now