Update plugins to latest revisions

- Organize imports
- Add buck resources to .gitignore

Change-Id: Iec18c0bbc60c3f921c175edb1005a4cb6b54b2a1
Merge "Update plugins to latest revisions"
Merge "SSH: Inherit some commands from SshCommand"
SSH: Inherit some commands from SshCommand

Some SSH command classes were unnecessary inherited from BaseCommand
and were doing stdout/stderr initialization on their own. That's what
SshCommand class is for.

Change-Id: Ia31f1dedbc46b0e19019c905d6b3fad1d87ba7a0
Modify account command: Add option to set preferred email

Change-Id: I7d29fc21b2acbdaca3a851ae9ce0b71ee74c49a2
Merge "Modify account command: Add option to set preferred email"