Adjust fairing part origin and CoM

For #94.

Author: Robin Chang

GameData/SDHI/Service Module System/Parts/SDHI_2.5_ServiceModuleFairing/model.mu

@@ -14,7 +14,7 @@ PART
 
 	// --- node definitions ---
 	// definition format is Position X, Position Y, Position Z, Up X, Up Y, Up Z, Node Size
-	node_stack_panel = 0.0, 0.0, -1.374, 0.0, 0.0, -1.0, 1
+	node_stack_panel = 0.0, 0.0, -0.43025, 0.0, 0.0, -1.0, 1
 	TechRequired = supersonicFlight
 	entryCost = 600
 	cost = 200