fix test on Informix

Author: gavinking

hibernate-core/src/test/java/org/hibernate/orm/test/mapping/formula/FormulaTests.java

@@ -14,6 +14,7 @@
 import org.hibernate.annotations.Formula;
 
 import org.hibernate.community.dialect.FirebirdDialect;
+import org.hibernate.community.dialect.InformixDialect;
 import org.hibernate.dialect.DB2Dialect;
 import org.hibernate.community.dialect.DerbyDialect;
 import org.hibernate.dialect.HSQLDialect;
@@ -119,6 +120,8 @@ public static class Account {
 				override = @Formula("ltrim(str(rate * 100, 10, 2)) + '%'"))
 		@DialectOverride.Formula(dialect = FirebirdDialect.class,
 				override = @Formula("cast(rate * 100 as decimal(10,2)) || '%'"))
+		@DialectOverride.Formula(dialect = InformixDialect.class,
+				override = @Formula("trim(concat(to_char(rate * 100,'#&.&&'), '%'))"))
 		private String ratePercent;
 
 		public Long getId() {