Refactor get/setChestPlate to Chestplate. Addresses BUKKIT-3189

src/main/java/org/bukkit/craftbukkit/inventory/CraftEntityEquipment.java

@@ -108,11 +108,11 @@ public class CraftEntityEquipment implements EntityEquipment {
         setDropChance(HELMET_SLOT, chance);
     }
 
-    public float getChestPlateDropChance() {
+    public float getChestplateDropChance() {
         return getDropChance(CHEST_SLOT);
     }
 
-    public void setChestPlateDropChance(float chance) {
+    public void setChestplateDropChance(float chance) {
         setDropChance(CHEST_SLOT, chance);
     }
 

src/main/java/org/bukkit/craftbukkit/inventory/CraftInventoryPlayer.java

@@ -138,11 +138,11 @@ public class CraftInventoryPlayer extends CraftInventory implements org.bukkit.i
         throw new UnsupportedOperationException();
     }
 
-    public float getChestPlateDropChance() {
+    public float getChestplateDropChance() {
         return 1;
     }
 
-    public void setChestPlateDropChance(float chance) {
+    public void setChestplateDropChance(float chance) {
         throw new UnsupportedOperationException();
     }