(PUP-3011) Accept. tests - 3.7 PMT updates install

This commit adds additional acceptance test coverage for updates
to the puppet module install command. These tests validate the
following:

* (PUP-2078) Install with force should not reinstall dependencies
* (PUP-2912) Installing a module containing a symlink should
  succeed but warn about the symlink.
This removes the "<version" part of the test, which seems important.