Removes the chef-server-ctl password command; no more updateobjecttool

This subcommand is broken since in 12 we've removed all of the *objecttools(s):
```
root@standalone165:~# chef-server-ctl password
Usage: private-chef-ctl password <username> [--disable]
root@standalone165:~# chef-server-ctl password whyy
(eval):17:in `block (2 levels) in load_files': undefined method `[]' for nil:NilClass (NoMethodError)
	from /opt/opscode/embedded/lib/ruby/gems/1.9.1/gems/omnibus-ctl-0.3.0/lib/omnibus-ctl.rb:177:in `call'
	from /opt/opscode/embedded/lib/ruby/gems/1.9.1/gems/omnibus-ctl-0.3.0/lib/omnibus-ctl.rb:177:in `block in add_command_under_category'
	from /opt/opscode/embedded/lib/ruby/gems/1.9.1/gems/omnibus-ctl-0.3.0/lib/omnibus-ctl.rb:555:in `run'
	from /opt/opscode/embedded/lib/ruby/gems/1.9.1/gems/omnibus-ctl-0.3.0/bin/omnibus-ctl:31:in `<top (required)>'
	from /opt/opscode/embedded/bin/omnibus-ctl:23:in `load'
	from /opt/opscode/embedded/bin/omnibus-ctl:23:in `<main>'
```