* partial fix for lbboundaries force interface

* lbboundaries: Bind get_force in python if.

* lbboundaries: Fix type for float params

* Added lb_stokes_sphere testcase.

* testsuite: Feature check for lb stokes tc.

* test_suite: Shortened mass-and-rinertia_pp test

* Revert "test_suite: Shortened mass-and-rinertia_pp test"

This reverts commit 9130d2b145ecc0434823e9340cf9e60f85652acc.

* testsuite: Remove lb stokes CPU test. Takes too long.

* testsuite: Readded lb stokes gpu file.

* testsuite: Better error measure for lb stokes sphere.