fix postfix for persistent disks

bootnode/bootnode.py

@@ -194,7 +194,7 @@ class Bootnode(object):
 
     def delete_deployment(self, name):
         self.kube.delete_service('service-' + name)
-        self.kube.delete_persistent_volume_claim(name+'-pv')
+        self.kube.delete_persistent_volume_claim(name+'-pd')
         self.kube.delete_deployment(name)
 
     def list_deployments(self, network=None):

bootnode/template.py

@@ -376,7 +376,7 @@ class Blockchain(Deployment):
     def get_volume_claim(self, size='10Gi'):
         return PersistentVolumeClaim(
             metadata=Metadata(
-                name=self.name + '-pv',
+                name=self.name + '-pd',
                 cluster=self.cluster,
                 blockchain=self.blockchain,
                 network=self.network