[maven-release-plugin] prepare release 9-RC1
[maven-release-plugin] prepare for next development iteration
DEP-85 : Upgrade to Parent POM 14-SNAPSHOT to use GWT (plugin) and deps 3.6.1
DEP-85 : Upgrade smartgwt 2.5 -> 4.0 and xwiki 5.0.3 -> 5.4.2 to fix wiki instabilities on IE11
SWF-2923 : Create pkg-improv branch and update projects versions