PAR-213 : Downgrade to lesscss 1.3.0. platformui doesn't build with 1.3.3
[PAR-121] - pluginManagement : Upgrade org.apache.maven.plugins:maven-pmd-plugin 2.4 -> 3.0.1
[PAR-185] - pluginManagement : Add org.codehaus.mojo:gwt-maven-plugin:2.5.1
[PAR-214] - pluginManagement : Upgrade org.jibx:maven-jibx-plugin:1.1.6a -> 1.2.5