add version number to MANIFEST.MF in plugin too
add version number to MANIFEST.MF in plugin too

Factory.loadEnvironment() reads META-INF/MANIFEST.MF in plugin project that we were NOT updating during build. So for example Factory.getVersion() was returning null
mariusj/org.openntf.domino,rPraml/org.openntf.domino,mariusj/org.openntf.domino,mariusj/org.openntf.domino,rPraml/org.openntf.domino,OpenNTF/org.openntf.domino,OpenNTF/org.openntf.domino,OpenNTF/org.openntf.domino,rPraml/org.openntf.domino,rPraml/org.openntf.domino