PLF-4469 : Allow to configure logs of Tomcat based distributions from ${catalina.base}/gatein/conf/exo.properties
PLF-4469 : rename configuration.properties (not used anymore) to exo-sample.properties (to be cleaned)
PLF-4469 : jbosscache and jgroups configurations must be loaded from classpath (platform-extension-config-VERSION.jar)
PLF-4469 : jbosscache and jgroups configurations must be loaded from classpath (platform-extension-config-VERSION.jar)
PLF-4469 : Extract exo-sample.properties from platform-extension-config.jar
PLF-4469 : Remove JODConverter, Emails, Assets configuration from env scripts (EXT_SYS_CONF_01, EXT_SYS_CONF_02, EXT_SYS_CONF_03, EXT_SYS_CONF_04)
PLF-4469 : Add an environment variable EXO_CONF_DIR to easily move the exo/gatein configuration directory
PLF-4469 : Remove exo.conf.dir.name
PLF-4469 : Install all *-sample.properties files from platform-extension-config.jar
PLF-4469, PLF-5897 : Rename properties :
gatein.conf.dir -> exo.conf.dir
gatein.data.dir -> exo.data.dir
gatein.jcr.data.dir -> exo.jcr.data.dir
gatein.jcr.index.data.dir -> exo.jcr.index.data.dir
gatein.jcr.storage.data.dir -> exo.jcr.storage.data.dir
PLF-4722 : Define default performance settings for PLF 4.1 Express/Enterprise package
* update JVM Xmx to 3g
PLF-5898 : Remove the legacy extensions-manager and the crash extension for tomcat
PLF-5993 : Upgrade bundled Apache Tomcat 7.0.54 -> 7.0.55
Merge in master feature/pkg-improv which contains PLF-4469,PLF-5897,PLF-5898,PLF-5993
SWF-2923 : Create pkg-improv branch and update projects versions

Signed-off-by: Arnaud Héritier <aheritier@exoplatform.com>
PLF-5898 : Use the SNAPSHOT version of the add-ons manager