Make QueryBuilderTest#fieldWithParenthesizedValues less specific

This appears to be an incompatibility with Antlr 3.2 which is used
internally at Google.

Change-Id: Ia829c8a275dd662e219cf16f7781ed06e83746f8
diff --git a/javatests/com/google/gerrit/index/query/QueryBuilderTest.java b/javatests/com/google/gerrit/index/query/QueryBuilderTest.java
index d275fa8..5de3c54 100644
--- a/javatests/com/google/gerrit/index/query/QueryBuilderTest.java
+++ b/javatests/com/google/gerrit/index/query/QueryBuilderTest.java
@@ -70,9 +70,7 @@
 
   @Test
   public void fieldWithParenthesizedValues() throws Exception {
-    assertThatParseException("a:(foo bar)")
-        .hasMessageThat()
-        .isEqualTo("line 1:2 no viable alternative at input '('");
+    assertThatParseException("a:(foo bar)").hasMessageThat().contains("no viable alternative");
   }
 
   @Test