To avoid any confusion, commands passed to exec_sudo() should be a
list of "str"s. Log a message if we see unicode issues.
This also adds a debug trace of all output. stderr is captured.
This is modified to raise CalledProcessError on failure, like
check_call(). Calls that are ok to fail will need to explicitly catch
and ignore this.
The two calls that we expect to fail are wrapped
We wish to try rolling back if one of these command raises an
exception. Modify the create handler to initiate rollback on all
exceptions.
Change-Id: Iee4fa41ffaf243e4728bf3a5eeec5c8fa8d2dadc
0d8c4270c0