Handle the case when the oinstall group already exist on the network

[MichaelPereira]

Hi Ari,

I ran into this problem while installing the oracle client on our machine as the group oinstall is already created on the network. With this change, we can avoid the error that chef will throw when trying to create an existing group.

The oracli_user_config.rb will also try to create as it is a default group in node[:oracle][:cliuser][:sup_grps] but this can be disabled by removing it from the default attributes or overriding it at the node/role level.

Let me know if you have any comments or questions

[aririikonen]

Michael,

Thank you for your pull request. How about, if we just add an not_if to the resource, like this.

not_if "grep ^oinstall /etc/group"

Would that work?

[MichaelPereira]

You're right, it's a simple way that avoid adding one more attribute. I will change the code and update the PR this week-end