Fix the flaky tests I just introduced

Signed-off-by: Simeon Widdis <sawiddis@amazon.com>

Author: Swiddis

ppl/src/test/java/org/opensearch/sql/ppl/antlr/PPLSyntaxParserTest.java

@@ -11,6 +11,7 @@
 
 import java.util.List;
 import org.antlr.v4.runtime.tree.ParseTree;
+import org.hamcrest.text.StringContainsInOrder;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
@@ -340,6 +341,10 @@ public void testDescribeCommandWithSourceShouldFail() {
     exceptionRule.expectMessage(
         "[=] is not a valid term at this part of the query: 'describe source=' <-- HERE. Expecting"
             + " tokens: EOF, '|', ',', '.'");
+    exceptionRule.expectMessage(
+        StringContainsInOrder.stringContainsInOrder(
+            "[=] is not a valid term at this part of the query: 'describe source=' <-- HERE.",
+            "Expecting tokens:"));
 
     new PPLSyntaxParser().parse("describe source=t");
   }
@@ -348,9 +353,12 @@ public void testDescribeCommandWithSourceShouldFail() {
   public void testInvalidOperatorCombinationShouldFail() {
     exceptionRule.expect(RuntimeException.class);
     exceptionRule.expectMessage(
-        "[<EOF>] is not a valid term at this part of the query: '...= t | where x > y OR' <-- HERE."
-            + " Expecting one of 294 possible tokens. Some examples: 'SEARCH', 'DESCRIBE', 'SHOW',"
-            + " 'FROM', 'WHERE', ...");
+        StringContainsInOrder.stringContainsInOrder(
+            "[<EOF>] is not a valid term at this part of the query: '...= t | where x > y OR' <--"
+                + " HERE.",
+            "Expecting one of ",
+            " possible tokens. Some examples: ",
+            "..."));
 
     new PPLSyntaxParser().parse("source = t | where x > y OR");
   }