UP-4142 Importing local group changes updates cached entries

https://issues.jasig.org/browse/UP-4142

Also shows failed data import from Admin UI in red to make it more clear a failure occurred.

I have not yet been able to test in a clustered uPortal environment, but this change works in a single node.  An ant initdb yields correct group and membership information for groups of people and portlets.  Am submitting change to get reviewed and into code base.  I will test clustered scenario and submit update if it doesn't work (code comments suggest it will work, just can't get hsql db server to accept connections from another machine to test).
Do you have a suggestion how to do this?  I didn't want to change the root logger to a lower level like debug, and I didn't want to fill command-line.logback.xml with a bunch of commented-out Script1, Script2, Script3 entries (how far do you go?)

Nuts.  I just noticed I forgot to change the log levels from error back to debug.