Fix return of test_ini_config & test_meta_config

Convert test_ini_config to use the "passed / failed" functions in
unittest.sh.  test_meta_config wraps everything into a function; it's
not work unrolling this so just make sure it exits with non-zero if a
test fails.

Change-Id: I9e9883fdad42358255383eede9121b1d361799c8
diff --git a/tests/test_meta_config.sh b/tests/test_meta_config.sh
index 9d65280..3ec65bf 100755
--- a/tests/test_meta_config.sh
+++ b/tests/test_meta_config.sh
@@ -17,6 +17,7 @@
         echo "OK"
     else
         echo -e "failed: $actual != $expected\n"
+        exit 1
     fi
 }