SLING-3779 - Export Wizard does not report all errors

Catch RuntimeException as well.

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1612554 13f79535-47bb-0310-9956-ffa450edef68
Bump version to 1.0.2 in preparation for release

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1612561 13f79535-47bb-0310-9956-ffa450edef68