Add ability to ignore unlisted users

[schleyfox]

This allows gratan to be run on databases that have users managed in other ways by specifying an option that it should only attempt to drop users that are listed in some way in the Grantfile. This also adds an option in the dsl to specify users as dropped.

My use case is that I have a bunch of databases with users managed in various ways. I'd like to start managing some accounts with gratan (or something), but I'm not ready, willing, or able to think about managing all accounts in this way.

🎸👍💃

[coveralls]

Coverage increased (+0.04%) when pulling 090b8ed on schleyfox:allow-unmanaged-user-accounts into 16f3a3a on winebarrel:master.

[coveralls]

Coverage increased (+0.04%) when pulling e366238 on schleyfox:allow-unmanaged-user-accounts into 16f3a3a on winebarrel:master.

[coveralls]

Coverage increased (+0.05%) when pulling 1859859 on schleyfox:allow-unmanaged-user-accounts into 16f3a3a on winebarrel:master.

[winebarrel]

Thank you for pull request!
I'm sorry for late reply...

[winebarrel]

I think this feature is too special. (not versatile)

Can following methods solve your problem?

1. comment out

=begin
user 'scott', 'localhost', identified: 'tiger' do
  on '*.*' do
    grant 'SELECT'
  end
end
=end

#user 'scott', 'localhost', identified: 'tiger' do
#  on '*.*' do
#    grant 'SELECT'
#  end
#end

2. unless statement

unless :dropped
user 'scott', 'localhost', identified: 'tiger' do
  on '*.*' do
    grant 'SELECT'
  end
end
end