
The default state is 'present', keeping the existing behaviour of the role. If 'apt_package_pinning_state' is set to 'absent' then the specified pin file will be removed. This functionality may be needed when removing an upstream repository configuration and associated pins in order to change back to using distro provided packages. Change-Id: I1f1adbef8f9d8cf787d00b6ef26b1acba2beb83e