fix: widen prepared statement waits

Author: dkropachev

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

@@ -267,12 +267,12 @@ private void invalidationTestInner(
       session.execute("ALTER TYPE test_type_2 add i blob");
 
       // wait for latches and fail if they don't reach zero before timeout
-      assertThat(Uninterruptibles.awaitUninterruptibly(typeChangeEventLatch, 30, TimeUnit.SECONDS))
+      assertThat(Uninterruptibles.awaitUninterruptibly(typeChangeEventLatch, 60, TimeUnit.SECONDS))
           .withFailMessage("typeChangeEventLatch did not trigger before timeout")
           .isTrue();
       assertThat(
               Uninterruptibles.awaitUninterruptibly(
-                  preparedStmtCacheRemoveLatch, 30, TimeUnit.SECONDS))
+                  preparedStmtCacheRemoveLatch, 60, TimeUnit.SECONDS))
           .withFailMessage("preparedStmtCacheRemoveLatch did not trigger before timeout")
           .isTrue();