CP-6167: Fix pylint issues with drivers/LUNperVDI.py

Signed-off-by: Siddharth Vinothkumar <siddharth.vinothkumar@citrix.com>
CP-6167: Fix pylint errors with drivers/RawHBASR.py

Signed-off-by: Siddharth Vinothkumar <siddharth.vinothkumar@citrix.com>
CP-6167: Fix pylint issues with drivers/blktap2.py

Signed-off-by: Siddharth Vinothkumar <siddharth.vinothkumar@citrix.com>
CP-6167: Fix pylint issues with drivers/lcache.py

Signed-off-by: Siddharth Vinothkumar <siddharth.vinothkumar@citrix.com>
CP-6167: Fix pylint issues with drivers/mpathcount.py

Signed-off-by: Siddharth Vinothkumar <siddharth.vinothkumar@citrix.com>
CP-6167: Fix pylint issues with drivers/scsiutil.py

Signed-off-by: Siddharth Vinothkumar <siddharth.vinothkumar@citrix.com>
CP-6167: Fix pylint issues with drivers/srmetadata.py

Signed-off-by: Siddharth Vinothkumar <siddharth.vinothkumar@citrix.com>
CP-6167: Fix pylint issues with drivers/sysdevice.py

Signed-off-by: Siddharth Vinothkumar <siddharth.vinothkumar@citrix.com>