Certificate password request updates
This merge request simplifies the JAKeyStore
a bit and improves the interaction between JShell and JBox. The improvements are:
- JShell will ask again for password if password was wrong
- JShell will not ask for certificate password if certificate isn't encrypted
- JBox can be started headless even with encrypted certificate with
"echo $PASS | ./jalien login"
This is just the first step of improvements in this place. More improvements should be ready soon. Please test and compare to the version available in CVMFS.