Simplify ml2_config.ini symlink resource management

Move file resource outside conditional so it's managed once and
manage dependencies in conditional instead.

Change-Id: I56b30173db4a56cf3ad211a9656c628977eec99b
(cherry picked from commit 763ec3527e0985358828cf8b9fe2d47fbaa29a75)
Merge "Simplify ml2_config.ini symlink resource management" into stable/icehouse