core: Fix duplicate upgrade script (build break)

Change Id Ie11d3d4e2c5e8b9a8096d742bc35cab82ff27bd0 introduce upgrade
script 03_02_0310, which already existed (introduced in Change Id
Ia9f8b60280d76b73a26f0d5feaf6650c7ef7ce7e).

The fix is trivial, since there is no direct dependency between 0310,
0320 and the new 0330, which the problematic script was renamed to.

Change-Id: I655342d316db5680e5df08329e45b30de12eae6c
Signed-off-by: Allon Mureinik <amureini@redhat.com>