Name 03-mariadb files uniquely

Updates the RDO version of the 03-mariadb-dev and 10-mariadb-packages
so that they are named uniquely. This is per DIB conventions where files
which have the same names can override each other.

This will enable us to add a unit test to enforce unique filenames
in TIE (see Ic22f9eb5e002a0cfe94942e7210eb73231560e82).

Change-Id: I9227307c5a0cc7975df40fe0ef71c6d306265b58
Merge "Name 03-mariadb files uniquely"