This patch adds to cgget option -a:

This patch adds to cgget option -a:

v2:
removed bunch of unnecessary error messages
This patch adds to cgget option -a:
-a     print the variables for all controllers which consists given cgroup

EXAMPLE:
$ ./cgget -a /daemons
/daemons:
cpuset.memory_spread_slab=0
cpuset.memory_spread_page=0
cpuset.memory_pressure=0
cpuset.memory_migrate=0
cpuset.sched_relax_domain_level=-1
cpuset.sched_load_balance=1
cpuset.mem_hardwall=0
cpuset.mem_exclusive=0
cpuset.cpu_exclusive=0
cpuset.mems=
cpuset.cpus=
cpuacct.stat=user 0
system 0
cpuacct.usage_percpu=0 0
cpuacct.usage=0

Signed-off-by: Ivana Hutarova Varekova <varekova@redhat.com>
Signed-off-by: Balbir Singh <balbir@linux.vnet.ibm.com>