Update jboss-forge to 2.5.0

The 2.x command line tools are distributed in two different zip archives on
https://github.com/forge/core#get-started-with-the-command-line-tools

The "offline" zip used in this formula contains the Forge runtime and the core
addons. 

The "no addons" zip contains only the runtime and asks the user on
first run whether the core addons should be installed (through maven).

We might consider an option like --without-core-addons in the future to let the
user install only the runtime.