classloading in 3.0

[Radim Kolar]

I propose to make classloading in 3.0 entirely different. Give user 
aplication access to javax.* stuff and other required J2EE 6 apis and 
nothing else unless told otherwise by deployment descriptor.

If user includes springs in WAR then use them instead springs in 
geronimo (emulate parent last classloading). Because almost no apps are 
using J2EE 6 now, people can try G2.2 vs G3 if they have problems with 
classloading and they are not willing to write deployment descriptors.