Travis-ci: attemp to fix sonarqube.
Travis-ci: attemp to fix sonarqube.

Even though it fixes the build, tests on separate
branches suggest that there is something broken still.

LebedevRI/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed