Handle multiple instances of same resource that use

[shihanng]

Handle multiple instances of the same package manager resource.

We can't execute multiple apt-get install or brew install concurrently. We will get the following errors

E: Could not get lock /var/lib/dpkg/lock

Error: Another active Homebrew process is already in progress.

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Possible solution:
See https://discuss.hashicorp.com/t/for-each-support-sequential-operation/34680/2