NIFI-4098 - Adjust ParseCEF to re-use bean validator in order to impr…

[trixpan]

…ove performance

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[pvillard31]

From a coding point of view, it LGTM. On the L&N side, I'd appreciate another pair of eyes to be sure we're good to go. @joewitt ?

Also, @trixpan, I think the updated dependency is now available in Maven central, could you force another Travis build?

[joewitt]

please remove lines 52-56.

[joewitt]

please remove lines 34-38.

[joewitt]

have verified L&N. Fixed an unrelated L&N finding and cleaned up the things i left comments on. Checked all dependencies and they're covered too. Good job. +1 merging to master