Set default bootstrap version in test.go to 14.12

Signed-off-by: Eduardo J. Ortega U <[email protected]>

test.go

@@ -76,7 +76,7 @@ For example:
 // Flags
 var (
 	flavor           = flag.String("flavor", "mysql57", "comma-separated bootstrap flavor(s) to run against (when using Docker mode). Available flavors: all,"+flavors)
-	bootstrapVersion = flag.String("bootstrap-version", "10.2", "the version identifier to use for the docker images")
+	bootstrapVersion = flag.String("bootstrap-version", "14.12", "the version identifier to use for the docker images")
 	runCount         = flag.Int("runs", 1, "run each test this many times")
 	retryMax         = flag.Int("retry", 3, "max number of retries, to detect flaky tests")
 	logPass          = flag.Bool("log-pass", false, "log test output even if it passes")