Drop deprecated API usage in HVAC

We already require hvac>=0.10.6, which is the latest.
hvac has had significant refactoring, moving the python API to new
locations. We do not need to keep anything that is dprecated.

Author: cognifloyd

actions/delete_policy.py

@@ -3,4 +3,4 @@
 
 class VaultPolicyDeleteAction(action.VaultBaseAction):
     def run(self, name):
-        return self.vault.delete_policy(name)
+        return self.vault.sys.delete_policy(name)

actions/is_initialized.py

@@ -3,4 +3,4 @@
 
 class VaultIsInitializedAction(action.VaultBaseAction):
     def run(self):
-        return self.vault.is_initialized()
+        return self.vault.sys.is_initialized()

actions/read_kv.py

@@ -6,10 +6,13 @@ def run(self, path, kv_version, mount_point, version):
         value = None
 
         if kv_version == 1:
-            value = self.vault.kv.v1.read_secret(path=path, mount_point=mount_point)
+            value = self.vault.secrets.kv.v1.read_secret(
+                path=path, mount_point=mount_point
+            )
         elif kv_version == 2:
-            value = self.vault.kv.v2.read_secret_version(path=path, mount_point=mount_point,
-                                                         version=version)
+            value = self.vault.secrets.kv.v2.read_secret_version(
+                path=path, mount_point=mount_point, version=version
+            )
 
         if value:
             return value['data']

actions/set_policy.py

@@ -3,4 +3,4 @@
 
 class VaultPolicySetAction(action.VaultBaseAction):
     def run(self, name, rules):
-        return self.vault.set_policy(name, rules)
+        return self.vault.sys.create_or_update_policy(name, rules)