libcgroup: create function for cgroup_create_cgroup

libcgroup: create function for cgroup_create_cgroup

From: Sudhir Kumar <skumar@linux.vnet.ibm.com>

This patch creates the function test_cgroup_create_cgroup(), to create a
group in fs from a cgroup structure, and this way eliminates lot of redundant
code. This patch however may mesh up the numbering of testcases, which will
be cleaned up in a later patch once the functions are created for all other
apis.

Signed-off-by: Sudhir Kumar <skumar@linux.vnet.ibm.com>
Signed-off-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
git-svn-id: https://libcg.svn.sourceforge.net/svnroot/libcg/trunk@286 4f4bb910-9a46-0410-90c8-c897d4f1cd53