Fix path for icub-tests context

[gsisinna]

This fix the regression from #556. We tested it with:

yarp resource --context icubEth --from joint_limits_face.ini

Now $YARP_DATA_DIRS env variable points to the correct folder for icub-tests contexts.

cc @valegagge

[traversaro]

Thanks @gsisinna !

Just for the sake of completeness, it useful to mentione that ideally we should not mention the source directory at all in the setup.sh, to avoid this kind of problems. See robotology/icub-tests#57 (comment) .

[traversaro]

I just realized that there are several other points that needs the same fix, see:

• https://github.com/gsisinna/robotology-superbuild/blob/19672f0f2c3da27e2e3768c68c322ebcdccc8b15/cmake/template/setup.bat.in#L30
• https://github.com/gsisinna/robotology-superbuild/blob/master/cmake/template/addPathsToUserEnvVariables.ps1.in#L63
• https://github.com/gsisinna/robotology-superbuild/blob/master/cmake/template/removePathsFromUserEnvVariables.ps1.in#L66

[traversaro]

Do you think you can update #1117 (comment) ?

[traversaro]

Thanks a lot!