KVM-Test: Add new test: check block size

Check physical block size and logical block size for virtio block device:
1) Install guest with a new image.
2) Verify whether physical/logical block size in guest is same as qemu
   parameters.

changes from v1:
 - update method for getting params.

changes from v2:
 - make command for getting guest's block size configable.

Signed-off-by: Qingtang Zhou <qzhou@redhat.com>
Acked-by: Feng Yang<fyang@redhat.com>
Acked-by: Yiqiao Pu <ypu@redhat.com>
Signed-off-by: Feng Yang <fyang@redhat.com>
KVM Test: Fix import problem in some scripts

Some scripts is moved during merging, so other scripts which depends
on these scripts can't work well. This patch fix these import problems.

Signed-off-by: Qingtang Zhou <qzhou@redhat.com>
Signed-off-by: Feng Yang <fyang@redhat.com>
qemu: Move check_block_size.py to qemu/tests

Also udpate the import link

Signed-off-by: Feng Yang <fyang@redhat.com>
virt: Fix incorrect module patch as the output of check_patch tool
Signed-off-by: Qingtang Zhou <qzhou@redhat.com>
Signed-off-by: Yiqiao Pu <ypu@redhat.com>
KVM test: add steps to logging.info for check_block_size test

Add test steps into logging.info to make test step clearly;
changes from v1:
   Since check_block_size.py moved to qemu/test folder, so reformat patch
changes from v2:
   Update steps info to make steps more clearly
   Update error message to make failed reason more clearly

Signed-off-by: Xu Tian <xutian@redhat.com>
Acked-by: Suqin Huang <shuang@redhat.com>
Signed-off-by: Feng Yang <fyang@redhat.com>
config: Add check_block_size.cfg

Signed-off-by: Qingtang Zhou <qzhou@redhat.com>
Signed-off-by: Feng Yang <fyang@redhat.com>
Config: Update check_block_size.cfg

Make unattended_install script works in check_block_size.

Signed-off-by: Feng Yang <fyang@redhat.com>
qemu: Bug fix in check_block_size.py

kernel_params is used to add -apped in unattended_install now.
 So delete extra_params related code.
Also update the log message.

Signed-off-by: Feng Yang <fyang@redhat.com>
config: Add unattended_install's RHEL guest side config to check_block_size sub case.

Signed-off-by: Feng Yang <fyang@redhat.com>