Export YarpTestCase and YarpFixtureManager as a library

[traversaro]

For building test on external repository (for example codyco software or coman/walkman software), we need to expose the Yarp stuff.

We could create a yarp-tests library, given that this bits are iCub - indipendent, but probably requiring three different repos (robot-testing,yarp-tests,icub-tests) to be installed is an overkill, especially for users that don't use the superbuild.

Another option is to simply add the cmake logic to export them as a library directly from this repo for the moment.

[apaikan]

Another possibility is to have a platform-dependent folder in the RTF. Some YARP specific plugins/macros, ... can go into that folder which can be optionally compiled (ENABLE_YARP) and exported by the RTF cmake packages. This can also solve robotology/robot-testing-framework#15 reported by @randaz81 .

[traversaro]

@lornat75 which solution would you think would be best in the short term?

[traversaro]

I have to work on this for codyco-related testing, but we have to decide on which path to take... @lornat75 which option do you prefer ?

[lornat75]

The solution proposed by @apaikan seems good enough to me.

[traversaro]

👍

[traversaro]

Done in #4 .