Only print received packet if unsupported
bt_lib: Add new UUID for SPP
data: Split data files based on device type
data: Remove data files for specific crashes

These files will be replaced later for tests that exercise more SDP
code.
Remove support for BlueZ 4 API
Refactor test generation

Now, a single packets.py file is generated in testcases/ subdirectory.
bt_lib: Use human readable Bluetooth address
Remove check_regressions.sh

This script is mostly useless when data files are changed.
Add initial support for parsing ATT PDUs

This support should be enough for BlueZ to connect without errors.