Andromeda installation: unzip operation is far too long + GWT names are too long for Windows and leads to 80+ error messages: not really a smooth installation process on windows for the moment

On Windows, the current tar.gz (170Mb!!! vs 80Mb for 5.0 Hotfix) is making error because GWT names are too long for Windows. Moreover the whole unzipping process is taking more than 10 minutes on my PC (vs: 1 minute max on 5.0). This is mainly due to the large quantitiy of small file resources of GWT which are recopied for each sub-engine. Windows does not like at all all these small files.

The problem of time is related to the parent JIRA

However we should still refactor the name of certain GWT componenets to avoif all the warning error msg when trying to upzip Jahia. This is leading to a poor first end-user experience of Jahia and the user does not know if the build will work successfully after that or not.