Convert t_vcm to C++, plugging a memory leak

Convert t_vcm to C++, plugging a memory leak

Change init function to constructor

Extract COM log file writing from init to a function

Make do_md owner of t_vcm with unique_ptr

Move initialization of t_vcm out of init_md

Change pointer arrays to vectors where possible. Where not
possible, we now free dynamically allocated resources in destructor.

Change-Id: I711a8d81ec0343969dcb437d9a3b8a474d291e87