Fix for possibly interrupted nginx-common instalation

[NOtherDev]

I've moved Dpkg::Options::="--force-confdef" down to nginx installation instead of nginx-common only. My case was installing nginx with version specified on the box with an earlier nginx version already installed.

Before that change, the recipe tried to install package nginx-common without specifying its version, and it was reported as up to date. Then, nginx with specific version was installed and nginx-common was reported as needing update. During the update the prompt asking what to do with config appeared, like this, because the --force-confdef option was not passed down here, and all the installation failed at unresolved dependencies.