tests: skip more loop problems
tests: skip ts_scsi_debug_init really quiet
tests: introduce TS_CMD_UUIDGEN (never use installed one)
travis-ci: minor style cleanup

Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>
travis-ci, do make check as root
travis-ci, make -j8 and only failing checks
travis-ci: don't update gettext
travis-ci: enable all checks again
travis check losetup