Use protocol correctly in test url

Author: Michael-A-McMahon

src/test/java/oracle/r2dbc/impl/OracleReactiveJdbcAdapterTest.java

@@ -634,8 +634,9 @@ public void testTimezoneAsRegion() {
       // than a name (Europe/Warsaw).
       Connection connection = awaitOne(ConnectionFactories.get(
         ConnectionFactoryOptions.parse(format(
-          "r2dbc:oracle:%s://%s:%d/%s?oracle.jdbc.timezoneAsRegion=false",
-          protocol(), host(), port(), serviceName()))
+          "r2dbc:oracle%s://%s:%d/%s?oracle.jdbc.timezoneAsRegion=false",
+          protocol() == null ? "" : ":" + protocol(),
+          host(), port(), serviceName()))
           .mutate()
           .option(USER, user())
           .option(PASSWORD, password())