unit test for sdp rfcomm queries and sdp parser

move to subfolder

use local config.h for tests

add casts for btstack_memory gets, use getter/setter for enumerated flags to allow compilation with C++

overwrite stored names & link keys if no place remained

also clean object files in ../src

keep db_mem_link_keys and db_mem_names lists sorted by last used item

added explicit casts for btstack mallocs

extended testing of put_name and put_link_key by two scenarios: add device with name and serach by key, and vice versa

added test for put,get,delete of link key and device name