TEST: change intefration fs test format and mount order

Author: Qinghao Shi

TESTS/integration/fs-single/main.cpp

@@ -66,12 +66,12 @@ LittleFileSystem fs("sd");
 
 static control_t test_format(const size_t call_count)
 {
+    int format_err = fs.format(&sd);
+    TEST_ASSERT_EQUAL_INT_MESSAGE(0, format_err, "could not format block device");
+
     int mount_err = fs.mount(&sd);
     TEST_ASSERT_EQUAL_INT_MESSAGE(0, mount_err, "could not mount block device");
 
-    int format_err = fs.reformat(&sd);
-    TEST_ASSERT_EQUAL_INT_MESSAGE(0, format_err, "could not format block device");
-
     return CaseNext;
 }