MDEV-11: Generic storage engine test suite

mysql-test/suite/storage_engine/mask_engine.inc

@@ -0,0 +1,14 @@
+#
+# This include file just replaces the storage engine under test by the generic string <STORAGE_ENGINE>
+# in the next statement. More masks can be added by defining $add_regex, e.g.
+# let $add_regex = /$data_dir/<DATA_DIR>/ /$index_dir/<INDEX_DIR>/
+#
+
+--let $regex = /$storage_engine/<STORAGE_ENGINE>/i
+if ($add_regex)
+{
+  --let $regex = $regex $add_regex
+}
+--let $add_regex = 
+--replace_regex $regex
+