inquiry.py: change the inquiry test to be a standalone example util

test_inquiry.py is not really a test but more of an incomplete utility.
Move it to tools/inquiry.py and make it print output similar to the format
of sg_inq.

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
inquiry.py: add pretty print for BlockLimits VPD page

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
Merge pull request #35 from sahlberg/inquiry-test-update

Inquiry test update