[3251] Improvement: fix assertion (apache#3263)

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### What changes were proposed in this pull request?
Fixed assertion



Fix:  apache#3251

### Does this PR introduce _any_ user-facing change?
No

### How was this patch tested?

Ran test locally multiple times

---------

Signed-off-by: Rohit Satya <work.rohitsatya@gmail.com>

trino-connector/src/test/java/com/datastrato/gravitino/trino/connector/TestGravitinoConnector.java

@@ -214,7 +214,7 @@ public void testCreateCatalog() throws Exception {
     assertThat(computeActual("show catalogs").getOnlyColumnAsSet()).contains("memory");
 
     // testing the gravitino connector framework works.
-    assertThat(computeActual("select * from system.jdbc.tables"));
+    assertThat(computeActual("select * from system.jdbc.tables").getRowCount()).isGreaterThan(1);
 
     // test metalake named test. the connector name is gravitino
     assertUpdate("call gravitino.system.create_catalog('memory1', 'memory', Map())");

trino-connector/src/test/java/com/datastrato/gravitino/trino/connector/TestGravitinoConnectorWithMetalakeCatalogName.java

@@ -95,7 +95,7 @@ public void testCreateCatalog() throws Exception {
     assertThat(computeActual("show catalogs").getOnlyColumnAsSet()).contains("test.memory");
 
     // testing the gravitino connector framework works.
-    assertThat(computeActual("select * from system.jdbc.tables"));
+    assertThat(computeActual("select * from system.jdbc.tables").getRowCount()).isGreaterThan(1);
 
     // test metalake named test. the connector name is gravitino
     assertUpdate("call gravitino.system.create_catalog('memory1', 'memory', Map())");