virsh_managedsave: Fix configuration option

virsh_managedsave.status_error_yes.name_option.shut_status failed if it was
run as a part of the testsuite and the testing VM was running before. This
was due to misconfiguration of the environment, where the test was
expecting the machine to be off. Change the status command to kill the VM
before the test.
virttest.virsh: Fix argument error for vol_create_as.

Signed-off-by: Yu Mingfei <yumingfei@cn.fujitsu.com>
Merge pull request #702 from Antique/virsh-managedsave

Fix virsh managedsave
virttest.staging.utils_memory: Add utils_memory in virttest staging

This file is just the same as autotest/client/shared. It can be drop
when the utils_memory in autotest package.

Signed-off-by: Yiqiao Pu <ypu@redhat.com>
Update memory realted function in scripts

Signed-off-by: Yiqiao Pu <ypu@redhat.com>