Inconsistent license

[Dan Tran]

• The pom.xml uses LGPL 2.1
• the source tree's LICENSE uses LGPL 3.0 \
• JNAeratorMojo.java is ApacheV2
  which one is correct. Our Legal department prefers LPGL 2.1 over LGPL 3.0, and of source ApacheV2 is the most prefer