Maven plugins upgrade

dependency 2.3 -> 2.9
deploy 2.7 -> 2.8.2
eclipse 2.8 -> 2.9
enforcer 1.0.1 -> 1.3.1
GNUpg 1.4 -> 1.5
helper 2.1.1 -> 2.2
install 2.3.1 -> 2.5.2
jar 2.3.2 -> 2.5
release 2.2.1 -> 2.5.1
resources 2.5 -> 2.7