I tried to find it but i don't know where Armitage expect it to be.
Code:
root@notebook:/# find / -name database.yml
/etc/dradis/database.yml
/usr/lib/dradis/vendor/bundle/ruby/2.2.0/gems/sass-rails-4.0.3/test/fixtures/alternate_config_project/config/database.yml
/usr/lib/dradis/vendor/bundle/ruby/2.2.0/gems/sass-rails-4.0.3/test/fixtures/engine_project/test/dummy/config/database.yml
/usr/lib/dradis/vendor/bundle/ruby/2.2.0/gems/sass-rails-4.0.3/test/fixtures/sass_project/config/database.yml
/usr/lib/dradis/vendor/bundle/ruby/2.2.0/gems/sass-rails-4.0.3/test/fixtures/scss_project/config/database.yml
/usr/lib/dradis/vendor/bundle/ruby/2.2.0/gems/rails-4.1.9/guides/code/getting_started/config/database.yml
/usr/share/metasploit-framework/vendor/bundle/ruby/2.2.0/gems/metasploit-credential-1.0.1/spec/dummy/config/database.yml
I also tried to reinstall Armitage and metasploit framework but nothing changed..