Added a hardness value to machines

src/main/java/techreborn/blocks/BlockQuantumChest.java

@@ -14,6 +14,7 @@ public class BlockQuantumChest extends BlockContainer {
 
     public BlockQuantumChest() {
         super(Material.piston);
+        setHardness(2f);
     }
 
     @Override

src/main/java/techreborn/blocks/BlockQuantumTank.java

@@ -13,6 +13,7 @@ public class BlockQuantumTank extends BlockContainer {
 
     public BlockQuantumTank() {
         super(Material.piston);
+        setHardness(2f);
     }
 
     @Override

src/main/java/techreborn/blocks/BlockThermalGenerator.java

@@ -27,6 +27,7 @@ public class BlockThermalGenerator extends BlockContainer {
 
     public BlockThermalGenerator() {
         super(Material.piston);
+        setHardness(2f);
     }
 
     @Override