Convert load method to 1.9.3-compatible syntax

This accidentally used keyword arguments, which were first introduced in
Ruby 2. Convert to the equivalent options hash form.

Change-Id: I9bedf7977be60f0f8891a0de44496b3747c6bddf
Reviewed-on: https://gerrit.causes.com/30977
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane@causes.com>