Replace /tmp/cephtest/ with configurable path

Teuthology uses /tmp/cephtest/ as the scratch test directory for
a run.  This patch replaces /tmp/cephtest/ everywhere with a
per-run directory: {basedir}/{rundir} where {basedir} is a directory
configured in .teuthology.yaml (/tmp/cephtest if not specified),
and {rundir} is the name of the run, as given in --name.  If no name
is specified, {user}-{timestamp} is used.

To get the old behavior (/tmp/cephtest), set test_path: /tmp/cephtest
in .teuthology.yaml.

This change was modivated by #3782, which requires a test dir that
survives across reboots, but also resolves #3767.

Signed-off-by: Sam Lang <sam.lang@inktank.com>
add --name option to teuthology

Signed-off-by: Sam Lang <sam.lang@inktank.com>
Support power cycling osds/nodes through ipmi

This patch defines a RemoteConsole class associated
with each Remote class instance, allowing
power cycling a target through ipmi.

Fixes/Implements #3782.
Signed-off-by: Sam Lang <sam.lang@inktank.com>
Assign devices to osds using the device wwn

Linux doesn't guarantee device names (/dev/sdb, etc.)
are always mapped to the same disk.  Instead of assigning
nominal devices to osds, we map devices by their wwn
(/dev/disk/by-id/wwn-*) to an osd (both data and journal).

Signed-off-by: Sam Lang <sam.lang@inktank.com>
Remove console.py

Handling of ipmi via the console is now done through the
Console class in teuthology/orchestra/remote.py.

Signed-off-by: Sam Lang <sam.lang@inktank.com>