Add support for upgrade scripts for H2
Upgrades may or may not work (determined by my own experience). The failure seen was due to an activiti patch in 5.0.b, this patch is changes so if using later version of Alfresco the upgrades work.
There is however no guarantee that it will work in the future, but I think it is worth to have support, because if it works, you avoid having to recreate test data when upgrading alfresco version.

Since I couldn't find a good way to use wildcard copy for the upgrade scripts copying, it does have the version numbers included in path. So whenever Alfresco determines that it is time for a new folder for later version, this has to be added.