IGNITE-27934 Fix flaky GridBinaryAffinityKeySelfTest#testAffinity (#12896)

Author: zstan

modules/core/src/test/java/org/apache/ignite/internal/binary/GridBinaryAffinityKeySelfTest.java

@@ -36,6 +36,7 @@
 import org.apache.ignite.lang.IgniteCallable;
 import org.apache.ignite.lang.IgniteRunnable;
 import org.apache.ignite.resources.IgniteInstanceResource;
+import org.apache.ignite.testframework.GridTestUtils;
 import org.apache.ignite.testframework.junits.common.GridCommonAbstractTest;
 import org.junit.Test;
 
@@ -101,6 +102,11 @@ public void testAffinity() throws Exception {
                 // Expected error.
             }
 
+            assertTrue("Failed to wait for minor version change",
+                GridTestUtils.waitForCondition(() ->
+                        grid(0).context().discovery().topologyVersionEx().minorTopologyVersion() == 1,
+                    5_000));
+
             checkAffinity(igniteNoCache);
         }
     }