Fix warnings for unused variable.
Merge pull request #109 from galthaus/pull-req-master-e4517a40898eab087212433a7dea764948978fc6

sets of changes and unit tests that seem to get nova running somewhat [2/6]
[Ruby 1.9] Fix broken ip_range unit tests

`assert` is incorrectly used here, since it just tests that the first
argument is `true`, which in Ruby means _any_ object (eg. 0, 1, "", [],
{}) except `false` and `nil`.

Ruby 1.9 is stricter here and checks that the second argument is a
`String` or `Proc`, thus uncovering the bug/typo. `assert_equal` should
be used here instead.
Merge pull request #110 from jamestyj/jamestyj-ip-range-model-test

[Ruby 1.9] Fix broken ip_range unit tests
locate the new network proposal template based on relative path to the Rails app root location