[JENKINS-20791] ReleaseCause should extend UserIdCause

Signed-off-by: Anders Hammar <anders@hammar.net>
Merge pull request #14 from andham/JENKINS-20791

[JENKINS-20791] ReleaseCause should extend UserIdCause
Merge branch 'master' into hide-scm-password
Use a standard license URL.
This allows NetBeans to add license headers automatically.
The scmPassword does in fact need to be remembered, so keep it encrypted and add it to the arguments as needed.