bat: renumber conflicting tests

We had three 09-* tests, renumber them so we can prove we actually know
how to count when people look at our test directory.

Signed-off-by: Matthew Johnson <matthew.johnson@intel.com>

bat/tests/10-ister-config/description.txt

@@ -1,3 +1,3 @@
-09-ister-config
+10-ister-config
 ===============
 This test case tests the usage of ister config file during 'mixer build image'.

bat/tests/13-no-delta-packs-over-format-bump/description.txt

@@ -1,4 +1,4 @@
-09-no-delta-packs-over-format-bump
+13-no-delta-packs-over-format-bump
 ==================================
 This test creates a format bump using a manual process (not auto-format-bump)
 and attempts to create delta packs over that bump. No delta packs should be