Moved permissions to the new put mechanism

ref #39

src/models/actions/UpdatePermission.ts

@@ -37,14 +37,12 @@ export class UpdatePermission {
     /**
      * Converts a Permission object based on this.
      */
-    public async toPermission(): Promise<Permission> {
-        let newPermission: Permission = new Permission();
+    public async updatePermission(permission: Permission): Promise<Permission> {
+        permission.principal = await this.getPrincipal();
+        permission.target = this.target;
+        permission.action = this.action;
 
-        newPermission.principal = await this.getPrincipal();
-        newPermission.target = this.target;
-        newPermission.action = this.action;
-
-        return newPermission;
+        return permission;
     }
 
     /**