Scheduled Txs: Create MetadataViews

[joshuahannan]

Issue To Be Solved

Since Handler implements ViewResolver.Resolver, we should define some useful metadata views to describe different types of callbacks

Suggest A Solution

Give callbacks some standard ways to identify themselves, such as:

• How to retrieve the entitled handler capability
• What or how many kinds of users this handler serves
• Cron jon configuration schedules
• Name and Description (Display?)
• any more?