Add security to RegionWidgetService to ensure users can only update preferences
for RegionWidgets which they own
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Key: RAVE-114
URL: https://issues.apache.org/jira/browse/RAVE-114
Project: Rave
Issue Type: Sub-task
Components: build & development
Affects Versions: 0.2-INCUBATING
Reporter: Jesse Ciancetta
Fix For: 0.2-INCUBATING
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