Added support for named hierarchies to cgconfigparser.

Added support for named hierarchies to cgconfigparser.

Add the missing parts to make cgconfigparser able to mount named
hierarchies. It must add 'none' option to mount opts for mount without real
controller and with 'name=xxx' only, the rest (surprisingly) works out of the
box, only quoting needs special care.

Following cgconfig.conf is usable with the patch:
mount {
	"name=test" = /cgroup/test;

	"name=testwithcpu" = /cgroup/cpu;
	cpu = /cgroup/cpu;
}

group foo {
	"name=test" { }
	"name=testwithcpu" { }
	cpu { cpu.shares = 1024; }
}

Signed-off-by: Jan Safranek <jsafrane@redhat.com>