Added enforcer plug-in to ensure at least 3.3.9 version of mvn is used.
Added enforcer plug-in to ensure at least 3.3.9 version of mvn is used.

Signed-off-by: Akos Kitta <5adc53eb8928d8424ddf49bf102dba40aa33cffe@gmail.com>
crapo/sadlos2,crapo/sadlos2,crapo/sadlos2,crapo/sadlos2,crapo/sadlos2,crapo/sadlos2