added create method for StoragePasswords

- if wildcards are passed during StoragePasswords creation then sdk will throw an error

Author: akaila-splunk

lib/service.js

@@ -1988,6 +1988,12 @@
          */     
         init: function(service, namespace) {
             this._super(service, this.path(), namespace);
+        },
+        create: function(params, callback){
+            if(this.service.app == '-' || this.service.owner == '-'){
+                throw new Error("While creating StoragePasswords, namespace cannot have wildcards.");
+            }
+            this._super(params,callback);
         }
     });