odbc does not build on centos 7 out of the box

After install MariaDB 10.2 (after installing the custom repo), the following satisfy the cmake dependencies:
yum install MariaDB-client MariaDB-server MariaDB-devel unixODBC

However link failures happen if you run cmake then make. For this to build the following is needed:

• cmake -DWITH_OPENSSL=on
• modify tests/CMakeLists.txt to add z as a lib dep: SET(PLATFORM_DEPENDENCIES ${PLATFORM_DEPENDENCIES} "pthread" "dl" "z")

I'd suggest make WITH_OPENSSL=on the default setting since this is what we build with and fix the test cmake file.