[CI] Replace parted with lsblk

parted hangs waiting for user input (see examples below)
on Debian and Ubuntu nodes which have created a cinder
volume on lvm, causing POST_FAILURE of the entire CI job.
Zun (Cinder iSCSI LVM) jobs are affected.
parted seemingly tries to interpret contents of the created
volume and fails miserably.
Since there is no reason why we would need to see the output
of parted specifically, this patch is switching to use
lsblk to simply list visible block devices.
Along with the rest of the commands, this should be just
the right level of detail.
And we avoid having parted interpret internals of otherwise
opaque block devices.

Example issues:

Warning: Not all of the space available to
/dev/mapper/cinder--volumes-cinder--volumes--pool appears to be used, you can
fix the GPT to use all of the space (an extra 9732096 blocks) or continue with
the current setting?
Fix/Ignore?

Warning: Not all of the space available to
/dev/mapper/cinder--volumes-cinder--volumes--pool-tpool appears to be used, you
can fix the GPT to use all of the space (an extra 9732096 blocks) or continue
with the current setting?
Fix/Ignore?

Warning: Not all of the space available to
/dev/mapper/cinder--volumes-cinder--volumes--pool_tdata appears to be used, you
can fix the GPT to use all of the space (an extra 9732096 blocks) or continue
with the current setting?
Fix/Ignore?

Change-Id: I7beecf2dd6c49c8934722cf22efa74e920ecb060
(cherry picked from commit 654edef)

Author: yoctozepto

tests/get_logs.sh

@@ -29,7 +29,7 @@ copy_logs() {
 
     df -h > ${LOG_DIR}/system_logs/df.txt
     free  > ${LOG_DIR}/system_logs/free.txt
-    parted -l > ${LOG_DIR}/system_logs/parted-l.txt
+    lsblk > ${LOG_DIR}/system_logs/lsblk.txt
     mount > ${LOG_DIR}/system_logs/mount.txt
     env > ${LOG_DIR}/system_logs/env.txt