Add fuse_models::Transaction sensor model

[efernandez]

• Add fuse_models::Transaction sensor model

I'm going to send another PR with a fuse_models::GraphIgnition that complements this one and also adds a rostest. This should hopefully motivate #183 a bit more, although I understand the last comments there and they might actually be an issue. I still have to look at that.

I'm open to other approaches to load a recorded graph and transactions.

[efernandez]

@svwilliams @ayrton04 Could you share with me the error from the checks that are failing, please?

[ayrton04]

09:46:41  5: [fuse_optimizers.rosunit-FixedLagIgnition/SetInitialState][FAILURE]-------------
09:46:41  5: /home/ec2-user/workspace/test_rosdistro_fuse_PR-195/package/fuse_optimizers/test/test_fixed_lag_ignition.cpp:51
09:46:41  5: Value of: ros::service::waitForService("/fixed_lag/set_pose", ros::Duration(1.0))
09:46:41  5:   Actual: false
09:46:41  5: Expected: true
09:46:41  5: --------------------------------------------------------------------------------

09:46:37  3: [fuse_optimizers.rosunit-Optimizer/Constructor][FAILURE]------------------------
09:46:37  3: unknown file
09:46:37  3: C++ exception with description "According to the loaded plugin descriptions the class fuse_models::Unicycle2D with base class type fuse_core::MotionModel does not exist. Declared types are  fuse_locus::Unicycle2D" thrown in the test body.
09:46:37  3: --------------------------------------------------------------------------------

[efernandez]

Thanks. I forgot to close the plugin declaration with </class> 🤦

[svwilliams]

Sorry it took me so long to review this. Looks like you just need to rebase this, and I'll get it merged.