Add ODB:C++ Object-Relational Mapping(ORM)

ODB is an open-source, cross-platform, and cross-database
object-relational mapping (ORM) system for C++.

Now just add ODB compiler, the common runtime library(libodb) and odb sqlite
runtime library.
Modify formula to pass the brew test
ignore test
remove unused code
libodb: add 2.3.0 bottle.
libodb-sqlite: add 2.3.0 bottle.
odb: add 2.3.0 bottle.