Require newer rake 0.9.6, which is included in Ruby 2.0.

Signed-off-by: Oleg Girko <oleg.girko@jolla.com>
don't hardcode ruby1.9
[api] Use dup method instead of initialize_dup to copy BsRequestAction.

This is needed to port to Ruby 2.0 because initialize_dup class method
is now private.

Signed-off-by: Oleg Girko <oleg.girko@jolla.com>
[api] Fix unused variable warnings.

This is needed to port to Ruby 2.0 because these warnings
interfere with tests.

Signed-off-by: Oleg Girko <oleg.girko@jolla.com>