Cpu mode test case with managedsave command.
Add more managedsave cases.

Autostart the managedsave guest with auto_start_bypass_cache=1 in qemu.conf.
The managed save image is removed when undefining the domain with "--manage-save" flag.
List the domains with managed save state.
Managedsave with security_driver option.
Modify parameters of set_seclabel function as for autotest/virt-test#1794.
Add more tests for managedsaved command.

Transient domain test.
Invalid saved file test. Removing or modifying a saved file.
Test of restoring a saved guest
Test for managedsave command in a loop.
Merge pull request #293 from rbian/managedsave-cpu-mode

Cpu mode test case with managedsave command.