Merge pull request #332 from hluu/master

For job with retry - the attempt count doesn't match with log file when inserting into database - issue #331
Merge pull request #334 from hluu/master

Change the default concurrent execution option to "skip execution" #333
Merge pull request #336 from hluu/master

Failure emails should format start and end times for humans
Update test.jar used in XmlValidatorManagerTest to be compiled against Java 1.6.
Merge pull request #338 from Victsm/fix-test-jar-java-version

Update test.jar used in XmlValidatorManagerTest to be compiled against J...
Adding velocity-tools EscapeTool to able to escape certain data element to prevent XSS #339