Description of problem:
The ccm load command allows registration of load time parameters to
enable user configurable values to be retrieved from the user. Since
upgrade scripts will typically just invokes parts of the Loader.java
command they need to have a mechanism to define & prompt for
parameters prior to running the upgrade.

Version-Release number of selected component (if applicable):


How reproducible:


Steps to Reproduce:
1. Try to write an upgrade script needing user input.

Actual results:
Have to manually write code to prompt for user input.

Expected results:
Standard ccm runtime parameter handling code is available, as per the
'ccm load' command APIs.

Additional info: