'Check (Ubuntu,Debian) kernel config for CONFIG_RT_GROUP_SCHED for RT'

@classmethod
def checkRtGroupSched(cls):

    if (not cls._rtGroupSched):
        release = quietRun('uname    -r').strip('\r\n')
        output = quietRun(('grep    CONFIG_RT_GROUP_SCHED    /boot/config-%s' % release))
        if (output == '#    CONFIG_RT_GROUP_SCHED    is    not    set\n'):
            error('\n***    error:    please    enable    RT_GROUP_SCHED    in    your    kernel\n')
            exit(1)
        cls._rtGroupSched = True
