CA-142238: Fix parsing lvmohba probe xml

With xs64bit, sr-probe has attributes like supported_speeds
which have comma separated values that break the exising parser.

This patch ensures that we don't break the required xml even if the
exception contains additional tags with comma separated values.

Signed-off-by: Siddharth Vinothkumar <siddharth.vinothkumar@citrix.com>
Reviewed-by: Mate Lakat <mate.lakat@citrix.com>

GitHub: closes #23 on xenserver/xencert
CA-142337: Fix retVal of GetLunInformation

The current implementation of this method never sets the retVal to False
which leads to some spurious messages being printed on the report.

This patch sets the retVal to False when it can't find the required file
from '/dev/disk/by-scsibus/'

Signed-off-by: Siddharth Vinothkumar <siddharth.vinothkumar@citrix.com>
Reviewed-by: Flavien Quesnel <flavien.quesnel@citrix.com>

GitHub: closes #25 on xenserver/xencert