Fix ProtocolVersionInitialNegotiationIT for C* 4.0-rc1

Author: adutra

integration-tests/src/test/java/com/datastax/oss/driver/core/ProtocolVersionInitialNegotiationIT.java

@@ -66,8 +66,8 @@ public void should_downgrade_to_v3_dse() {
 
   @CassandraRequirement(
       min = "2.2",
-      max = "4.0",
-      description = "Only C* in [2.2,4.0[ has V4 as its highest version")
+      max = "4.0-rc1",
+      description = "Only C* in [2.2,4.0-rc1[ has V4 as its highest version")
   @Test
   public void should_downgrade_to_v4_oss() {
     Assume.assumeFalse("This test is only for OSS C*", ccm.getDseVersion().isPresent());
@@ -77,6 +77,18 @@ public void should_downgrade_to_v4_oss() {
     }
   }
 
+  @CassandraRequirement(
+      min = "4.0-rc1",
+      description = "Only C* in [4.0-rc1,*[ has V5 as its highest version")
+  @Test
+  public void should_downgrade_to_v5_oss() {
+    Assume.assumeFalse("This test is only for OSS C*", ccm.getDseVersion().isPresent());
+    try (CqlSession session = SessionUtils.newSession(ccm)) {
+      assertThat(session.getContext().getProtocolVersion().getCode()).isEqualTo(5);
+      session.execute("select * from system.local");
+    }
+  }
+
   @DseRequirement(
       min = "5.0",
       max = "5.1",
@@ -142,8 +154,8 @@ public void should_fail_if_provided_v4_is_not_supported_dse() {
 
   @CassandraRequirement(
       min = "2.1",
-      max = "4.0",
-      description = "Only C* in [2.1,4.0[ has V5 unsupported or supported as beta")
+      max = "4.0-rc1",
+      description = "Only C* in [2.1,4.0-rc1[ has V5 unsupported or supported as beta")
   @Test
   public void should_fail_if_provided_v5_is_not_supported_oss() {
     Assume.assumeFalse("This test is only for OSS C*", ccm.getDseVersion().isPresent());