Fix RCS tank types (#349)

Author: Clayell

RealFuels/SquadExpansion_modularFuelTanks.cfg

@@ -55,7 +55,7 @@
 	{
 		name = ModuleFuelTanks
 		volume = 25
-		type = Default
+		type = RCS
 	}
 }
 
@@ -65,7 +65,7 @@
 	{
 		name = ModuleFuelTanks
 		volume = 2500
-		type = Default
+		type = RCS
 	}
 }