This commit adds a new CLI/config option for the subunit2sql cli command
to use the run wall time when populating the run_time column of the runs
table. This is often desirable because it gives you a better feeling
for the duration of the run. However, since using the sum of individual
tests executed during a run has been the default behavior so long we
can't just switch it for backwards compat reasons. This commit thus adds
an option to use the behavior if that's what you need to use.
Change-Id: I08fe16604454f5888d56573e5e919e40ac82efd1
08da4131ed